(IntelliJ) Copilot Not Completing After Performing Certain Actions

[MikulDev]

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Copilot Feature Area

JetBrains & Xcode

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For the last week or so, Copilot has only been offering completions when I type a character or backspace a character. It no longer offers in-line completion when I:

• Delete a character (Del. key)
• Delete a selection with Backspace or Del.
• Accept a suggestion from the IDE (i.e. typing "Obj" and pressing Enter to complete "Object")

It used to trigger a completion in all of these instances, but now I have to either add/delete a character to "wake it up", or press the hotkey Alt+\ to manually trigger completions. It also stops working if the IDE suggests anything, even if I don't accept it.

"Automatically show completions" is enabled, and I tried turning on "Show IDE completions side-by-side" but the behavior did not change. Any help is appreciated, thanks.

[Akash1134]

Hi @MikulDev,

Thank you for reporting this issue with GitHub Copilot in IntelliJ. I understand how frustrating it can be when completions don't trigger consistently, especially after specific actions like deletions or IDE suggestions.

Here are a few troubleshooting steps that might help:

1. Update your Copilot extension: Ensure you're on the latest version (check in JetBrains Marketplace). Sometimes issues are fixed in newer releases.

2. Check your Copilot logs: You can view logs to help diagnose the issue by going to Help > Show Log in Explorer/Finder, then look for the Copilot log files. These logs might provide insights into why completions aren't triggering.

3. Temporarily disable other extensions: Some extensions might conflict with Copilot's key bindings or event handling.

4. Adjust your settings: In JetBrains IDEs, try toggling the "Show IDE completions side-by-side" setting and restart the IDE. Even though you mentioned this didn't help, sometimes changing settings and restarting can reset problematic states.

If you continue experiencing this issue, it would be helpful if you could share your exact IntelliJ version and the precise version of the GitHub Copilot plugin you're using. This will help the GitHub team diagnose the problem more effectively.

Thanks for your patience!

[MikulDev]

Thanks for your help. The suggestions don't seem to improve the situation, but I do see this a lot in the logs:

2025-04-28 13:14:21,159 [  11498]   WARN - #com.github.copilot.lang.agent.vscodeRpc.CancellableAsyncPromise - Error processing command textDocument/inlineCompletion, request id: 75, error code: -32800
com.github.copilot.lang.agent.rpc.JsonRpcErrorException: Error processing command textDocument/inlineCompletion, request id: 75, error code: -32800
	at com.github.copilot.lang.agent.vscodeRpc.DefaultJsonRpcMessageHandler.handleErrorResponse(DefaultJsonRpcMessageHandler.java:214)
	at com.github.copilot.lang.agent.vscodeRpc.DefaultJsonRpcMessageHandler.handleJsonMessage(DefaultJsonRpcMessageHandler.java:81)
	at com.github.copilot.lang.agent.vscodeRpc.VSCodeJsonRpcParser.processPendingContent(VSCodeJsonRpcParser.java:96)
	at com.github.copilot.lang.agent.vscodeRpc.VSCodeJsonRpcParser.appendLocked(VSCodeJsonRpcParser.java:76)
	at com.github.copilot.lang.agent.vscodeRpc.VSCodeJsonRpcParser.append(VSCodeJsonRpcParser.java:44)
	at com.github.copilot.lang.agent.vscodeRpc.AgentProcessHandler$1.onTextAvailable(AgentProcessHandler.java:37)
	at com.intellij.execution.process.ProcessHandler$2.onTextAvailable(ProcessHandler.java:292)
	at com.intellij.execution.process.ProcessHandler.notifyTextAvailable(ProcessHandler.java:223)
	at com.intellij.execution.process.BaseOSProcessHandler$SimpleOutputReader.onTextAvailable(BaseOSProcessHandler.java:133)
	at com.intellij.util.io.BaseOutputReader.processInput(BaseOutputReader.java:213)
	at com.intellij.util.io.BaseOutputReader.readAvailableBlocking(BaseOutputReader.java:151)
	at com.intellij.util.io.BaseDataReader.readAvailable(BaseDataReader.java:72)
	at com.intellij.util.io.BaseDataReader.doRun(BaseDataReader.java:153)
	at com.intellij.util.ConcurrencyUtil.runUnderThreadName(ConcurrencyUtil.java:218)
	at com.intellij.util.io.BaseDataReader.lambda$start$0(BaseDataReader.java:48)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
	at com.intellij.util.concurrency.ChildContext$runInChildContext$1.invoke(propagation.kt:103)
	at com.intellij.util.concurrency.ChildContext$runInChildContext$1.invoke(propagation.kt:103)
	at com.intellij.util.concurrency.ChildContext.runInChildContext(propagation.kt:109)
	at com.intellij.util.concurrency.ChildContext.runInChildContext(propagation.kt:103)
	at com.intellij.util.concurrency.ContextRunnable.run(ContextRunnable.java:27)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:735)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:732)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:400)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1.run(Executors.java:732)
	at java.base/java.lang.Thread.run(Thread.java:1583)
Caused by: com.github.copilot.lang.agent.rpc.JsonRpcErrorException: Request was canceled, request id: 75, error code: -32800
	at com.github.copilot.lang.agent.rpc.JsonRPC.parseResponse(JsonRPC.java:81)
	at com.github.copilot.lang.agent.vscodeRpc.DefaultJsonRpcMessageHandler.handleJsonMessage(DefaultJsonRpcMessageHandler.java:79)
	... 27 more

This error is in response to a request for inline completion, so this looks like the culprit.
Also, I've switched to using the most recent nightly build, if that helps:

• Copilot 1.5.43.10051-243-nightly
• IDEA Build #IC-243.26053.27
• Arch Linux 6.14.3-arch1-1

[hollowopk]

Same problem here, any update?

[MikulDev]

Nope, still does it. I tried using the built-in JetBrains AI from IDEA Ultimate but that was even less responsive. This is getting incredibly annoying, since Copilot has become a central part of my workflow by now.

[sergioave]

I faced the same problem with the request id: 32, error code: -32800 in the agent mode
Only works with gemini-2.5-pro, the others always same error

[credmond]

Seeing error code: -32800 almost non-stop for code suggestion/completion, using latest Intellij Ultimate and Copilot.

It's next to useless. Instead of some (non-AI) code completion, now there's often none. Ridiculous that there isn't even a fallback, or an error notification everytime Copilot fails to do something.

The quality is far too low for a paid product.

[Shreytan]

I ran into the same issue recently — Copilot only shows completions after typing or backspacing, but not when deleting characters, clearing selections, or accepting IDE completions. It seems to have started after a recent JetBrains update.

What worked for me:

Updated both the IDE and the Copilot plugin to the latest versions.

In Settings → GitHub Copilot → General, I turned “Automatically show completions” off, applied, then turned it back on and restarted the IDE.

If that didn’t help, deleting the Copilot config folder at

~/.config/github-copilot

and re-signing in fixed it.

If you’re still seeing the same behavior, try rolling back the plugin to an earlier version (I went back one version and completions started triggering again). Seems like a temporary regression in the latest build — hopefully fixed in the next update.

[credmond]

Thanks, but that clearing/resetting didn't help (I'm not going to revert as it's wasted enough time already):

2025-10-29 23:07:02,795 [  57995]   WARN - #com.github.copilot.lang.agent.vscodeRpc.CancellableAsyncPromise - Error processing command textDocument/inlineCompletion, request id: 105, error code: -32800
com.github.copilot.lang.agent.rpc.JsonRpcErrorException: Error processing command textDocument/inlineCompletion, request id: 105, error code: -32800
	at com.github.copilot.lang.agent.vscodeRpc.DefaultJsonRpcMessageHandler.handleErrorResponse(DefaultJsonRpcMessageHandler.java:215)
	at com.github.copilot.lang.agent.vscodeRpc.DefaultJsonRpcMessageHandler.handleJsonMessage(DefaultJsonRpcMessageHandler.java:82)
	at com.github.copilot.lang.agent.vscodeRpc.VSCodeJsonRpcParser.processPendingContent(VSCodeJsonRpcParser.java:96)
	at com.github.copilot.lang.agent.vscodeRpc.VSCodeJsonRpcParser.appendLocked(VSCodeJsonRpcParser.java:76)
	at com.github.copilot.lang.agent.vscodeRpc.VSCodeJsonRpcParser.append(VSCodeJsonRpcParser.java:44)
	at com.github.copilot.lang.agent.vscodeRpc.AgentProcessHandler$1.onTextAvailable(AgentProcessHandler.java:37)
	at com.intellij.execution.process.ProcessHandler$2.onTextAvailable(ProcessHandler.java:292)
	at com.intellij.execution.process.ProcessHandler.notifyTextAvailable(ProcessHandler.java:223)
	at com.intellij.execution.process.BaseOSProcessHandler$SimpleOutputReader.onTextAvailable(BaseOSProcessHandler.java:133)
	at com.intellij.util.io.BaseOutputReader.processInput(BaseOutputReader.java:213)
	at com.intellij.util.io.BaseOutputReader.readAvailableBlocking(BaseOutputReader.java:151)
	at com.intellij.util.io.BaseDataReader.readAvailable(BaseDataReader.java:72)
	at com.intellij.util.io.BaseDataReader.doRun(BaseDataReader.java:153)
	at com.intellij.util.ConcurrencyUtil.runUnderThreadName(ConcurrencyUtil.java:249)
	at com.intellij.util.io.BaseDataReader.lambda$start$0(BaseDataReader.java:48)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
	at com.intellij.util.concurrency.ChildContext$runInChildContext$1.invoke(propagation.kt:167)
	at com.intellij.util.concurrency.ChildContext$runInChildContext$1.invoke(propagation.kt:167)
	at com.intellij.util.concurrency.ChildContext.runInChildContext(propagation.kt:173)
	at com.intellij.util.concurrency.ChildContext.runInChildContext(propagation.kt:167)
	at com.intellij.util.concurrency.ContextRunnable.run(ContextRunnable.java:27)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:735)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:732)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:400)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1.run(Executors.java:732)
	at java.base/java.lang.Thread.run(Thread.java:1583)
Caused by: com.github.copilot.lang.agent.rpc.JsonRpcErrorException: Request was canceled, request id: 105, error code: -32800
	at com.github.copilot.lang.agent.rpc.JsonRPC.parseResponse(JsonRPC.java:82)
	at com.github.copilot.lang.agent.vscodeRpc.DefaultJsonRpcMessageHandler.handleJsonMessage(DefaultJsonRpcMessageHandler.java:80)
	... 27 more

They seem to have a serious gap in their QA and engineering function, because I've literally found dozens of pain-in-the-ass bugs in my 3 days of using the plugin. Probably relying too much on AI-generated code, generated by non-broken versions.