@Wupper:
"And what is the mistake? Sometimes it helps to send a screen recording to mail to developers, they respond faster."
First 2 posts describe the issue pretty well. TT RGB Plus 1.3.4 main UI window magically opens by itself and in the process minimizes any full screen game I may be in at the time. When I say 'opens by itself', like I had right clicked on the TT RGB Plus icon in my system tray and selected 'Launch TT RGB Plus'. Happened at seemingly random intervals (every 2-10 minutes) all the way up to me uninstalling it and re-installing 1.3.3 (which is working perfectly fine). If a dev is interested and comes across this post, an event viewer 'Application Error' (EventID 1000) is logged stating that TTRGBPlus.exe faulted from module Qt5Gui.dll.
Faulting module name: Qt5Gui.dll, version: 5.7.1.0, time stamp: 0x583ffd97
Exception code: 0xc0000005
Fault offset: 0x000000000006ce70
There are no other logs that I can find.