System Information
Operating System: Windows 10 Home 64-bit operating system, x64-based processor
Graphic card: NVIDIA GeForce GTX 1660 SUPER
Blender Version
Broken: 2.90.0, 2020-08-31 11:26, 0330d1af29c0, master
Short description of error
I cannot see vertices of some area but only a mesh in Edit mode. When I hit ‘Alt+H’ to unhide the object, everything returns to normal. However, I still cannot see or select these vertices in Weight Paint mode.
Additionally, some area of a mesh that have this problem do not move properly while weights are correctly painted.
Exact steps for others to reproduce the error
- Open attached .blend file.
- Select an object, and go to Edit mode and Weight Paint mode.
Thank you very much for taking your time!

