When I open the interface of any computer, and the slots are blocked, the following visual bug appears:

fixed in 564fdfe

by default R+G opens the GUI editor.
set ignore to true for the Screen

This has already been done. It didn't help

have you tried any other combination like ignore true for the container?
Please provide as much information as possible in the issues. So I don't have to ask about the basics.

is it forge? or fabric... or quilt

This is Forge, version 36.2.34.
Mod version: 1.5.3
CC:Tweaked mod version: 1.100.8
Here's the block where it doesn't work: computercraft:computer_advanced
Tried in all possible combinations, both in the container and on the screen.
This error disappears when there are no blocked slots on the hotbar.