Code screen will move up after write a unimported package method and undo

[elricli]

• VS Code Version: 1.55.1
• OS Version: Win10

Steps to Reproduce:

1. input the go code
2. write a unimported package method
3. ctrl+z
4. repeat step 2 and 3

Does this issue occur when all extensions are disabled?: No

Disable all extension, the problem can not reproduce, maybe can not autoimport.

Screenshots or recordings:

GIF:

Relate issues:

• code screen will move up after write a unimported package method and undo golang/vscode-go#1406

[alexdima]

@drrrMikado Does this reproduce if you disable all other extensions except the go extension? I have tried to reproduce with a suggestion that inserts an import, but the scroll top does not change when accepting the suggestion for me:

Kapture.2021-06-05.at.15.00.40.mp4

cc @jrieken if you ever saw something similar before.

[elricli]

Does this reproduce if you disable all other extensions except the go extension?

Yes.

Then I tried the automatic import of python, which can also be reproduced.

[alexdima]

👍 I can reproduce with go, which adds 2 lines for the import. Effectively, the extra edits insert 2 lines and the suggest controller scrolls down by 2 lines (increases scroll top by 2 * line height). When undoing, the two lines are removed, but the scroll top is maintained, thus the viewport is 2 lines lower.

So the actual request here is to record the scroll position in the undo stack.