Cannot create comment on pull request based on fork

[JackismyShephard]

• Extension version: 0.120.1
• VSCode Version: 1.105.1
• OS: Windows 11, Ubuntu 24.04
• Repository Clone Configuration : Single Repository
• GitHub Product GitHub.com

Steps to Reproduce:

1. Open GitHub Pull Request extension in VSCode
2. Find a Pull request based on a branch on a fork of main repo
3. Write a comment and press comment
4. Error is raised: Creating comment failed: Error: File has been deleted.

[JackismyShephard]

@alexr00 This seems to be potentially correlated with other issues like:

• Comments not possible to save within a submodule #6096

[alexr00]

Is your origin remote the main repo, the fork, or yet another fork?

[JackismyShephard]

@alexr00 I have tested two different setups: both main repo, but also fork of repo A trying to comment on PR made on another fork of A.

Crucially, there is no issue making a comment on repo A itself.