Errors disappear after saving a large file

[taranlu-houzz]

I have a medium sized project that has some large individual Python files (~3.5K lines). When I run mypy via Mypy: Recheck Workspace, the errors are all properly highlighted, but when I fix an error, and save the file, all of the highlighting goes away and often does not return until I manually re-run mpyp on the workspace, which takes several seconds. I think the issue may not happen, or may be less pronounced for smaller files.