This seems to be related or the same
No developer has reproduced a problem including myself. My Windows 11 dev system is similar to yours:
- Ryzen 5600G
- 32 GB RAM
- NVIDIA GeForce RTX 3060
- SSD main drive
Only time I had a problem that was similar to the problem reports was when Windows Update was upgrading in the background. When you experience the problem, check if Windows Update is applying an update or a restart is pending. If so, then reboot when it is ready. Still, I would not be surprised (from being exposed to all sorts of oddities reported by millions of downloads of Shotcut over 10 years) if there was something going on in the software that is only triggered under certain, unknown factors - probably not due to hardware but software such as driver or system extension.