Neighbour submenu requires extra mouse move to popup

[timothyqiu]

Tested versions

4.2.2.stable / 4.3.dev6 / master[bdc0316]

System information

Arch Linux #‍1 SMP PREEMPT_DYNAMIC Tue, 07 May 2024 21:35:54 +0000 - X11 - GLES3 (Compatibility) - NVIDIA GeForce RTX 3060 Ti (nvidia; 550.78) - 13th Gen Intel(R) Core(TM) i5-13400F (16 Threads)

Issue description

After moving to another menu item, its submenu does not popup until I move the mouse:

Steps to reproduce

Open the Editor menu and move your mouse between Editor Docks and Editor Layout. See the GIF above.

For older versions, you can open the Go To menu in the script editor, and move your mouse between Bookmarks and Breakpoints.

Minimal reproduction project (MRP)

N/A

[addmix]

Could not reproduce on Windows 11.

[kitbdev]

• Looks like a duplicate of PopupMenu ignores mouse hover to adjacent item after sub menu opened until jiggled #77246