For testing you could try two things:
1. Start your operating system in Safe Mode and see if the problem occurs there.
2. Install ARCHICAD on another computer and see if the problem occurs there.
I myself am now of the opinion that there may be something about your computer or system (or some install component or software) that is causing the issue.
Loving Archicad since 1995 - Find Archicad Tips at x.com/laszlonagy
AMD Ryzen9 5900X CPU, 64 GB RAM 3600 MHz, Nvidia GTX 1060 6GB, 500 GB NVMe SSD
2x28" (2560x1440), Windows 10 PRO ENG, Ac20-Ac27