Horizontal lines when menu hides in Composition Mode

Just wanted to point out that this bug has not been resolved for me as of the 3.0.1.0 update. Horizontal lines still appear when the menu auto-hides in Composition Mode. There are fewer of them than there were before the update, but they’re still there.

I’m not using dark mode, just the default theme. The lines appear in every theme I tested.

If there are details in a previous post, try linking to that post in this one.

The previous post is here. I did an uninstall/reinstall today to double check and the visual artifacts are there in Composition mode immediately after a fresh install, no settings changed, using the default theme. I’d appreciate any help anyone can give me troubleshooting this or explaining why it might be happening.