Xylight

this is important, and will help you find solutions much more specific than just “system freeze”

• Right after a crash, once you reboot, run journalctl -b -1 and scroll to the bottom. Look for any big red text, all of that will be very helpful to diagnose this issue

Otherwise,

• Does it freeze permanently, requiring a reboot, or for a few seconds?
  • If it’s just for a few seconds, and you’re on an AMD system, it would sound like an fTPM stutter. A BIOS update would likely fix that, it was a widespread issue.
• Are you using an AMD or NVIDIA GPU?
• Do you play any games or use any software that uses OpenGL? (Blender and minecraft are some I’ve had problems in before)

That site looks like it’s closed source. FOSS projects tend to not be well designed in the frontend except the occasional gem. Not sure why it’s such a pattern, considering this project isn’t making much money and it’s made by a single dev.