User-Agent:       Mozilla/5.0 (X11; Linux x86_64; rv:79.0) Gecko/20100101
Firefox/79.0
Build Identifier: 

Some regions in the UI are completely black while other work fine. 
The black regions also don't react to user-interaction (e.g. clicking blindly),
so it's not just a visual issue, it seems.
In the specific case, the network property editor connection list is
blacked-out. The details on the right for the current connection are still
visible but I cannot blindly select a different connection in the blacked-out
list.

Reproducible: Always

Steps to Reproduce:
1. Suspend/resume
2. Open network properties via the Network-Manager applet

Actual Results:  
UI partially blacked-out and non-functional

Expected Results:  
UI visible and functional

This is on a Thinkpad 20QN-000EGE with x11-video-nvidiaG05-450.57-38.1.x86_64

Tumbleweed snapshot 20200807

Using suse-prime-0.7.14-1.1.noarch

# prime-select get-current
Driver configured: intel
[bbswitch] NVIDIA card is ON

NVIDIA Quadro T1000

Screenshot available.