Can't figure out why my system keeps crashing

System:

Intel 10700 with iGPU

Gigabyte Z490M

Crucial 1TB NVME SSD

OpenCore 0.6.2

Catalina 10.15.7

system type iMac 20,1

AAPL,ig-platform-id: 00009B3E

device-id: 9B3E0000

Problem:

My system was stable for a few days, however now I get random restarts fairly frequently. When I go back through system.log there is nothing listed other than routine messages prior to the BOOT_TIME. I have OpenCore in debug with -v boot flag and I get no text output on the screen when it restarts.

This started after I switched from universal ACPI (SSDT-AWAC, SSDT-EC-USBX-DESKTOP, SSDT-PLUG) and USBInjectAll to ones generated with SSDTTime and USBMap. After I did this the system would boot fine but as soon as I entered my password would crash. I have switched back to the old files and I can log in but it still crashes fairly frequently.

Any idea what could be the reason or how to debug further?