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

• VS Code Version: 1.73.1
• OS Version: Windows_NT x64 10.0.22623

Steps to Reproduce:

1. Switch to the extension bar.
2. Try to hover some items. Some one may not show the default scroll bar, but the problem is exists.

I have tried to fix it. It seems caused by the visual bug from the issue #158921. The scroll bar will show when the content is too long.

This solution is great, but it causes another little bug in the screenshot.

I think it's unwise to remove the overflow-y: auto tag, so I tried another way, just add 1px to the tag max-height:

I'll make a PR after this issue has submitted.