Revert to original

Author: irvinesunday

src/Microsoft.OpenApi/Models/OpenApiDocument.cs

@@ -83,7 +83,7 @@ public OpenApiDocument(OpenApiDocument document)
             Workspace = document?.Workspace != null ? new(document?.Workspace) : null;
             Info = document?.Info != null ? new(document?.Info) : null;
             Servers = document?.Servers != null ? new List<OpenApiServer>(document.Servers) : null;
-            Paths = document?.Paths;
+            Paths = document?.Paths != null ? new(document?.Paths) : null;
             Components = document?.Components != null ? new(document?.Components) : null;
             SecurityRequirements = document?.SecurityRequirements != null ? new List<OpenApiSecurityRequirement>(document.SecurityRequirements) : null;
             Tags = document?.Tags != null ? new List<OpenApiTag>(document.Tags) : null;