[tesseractcat]

Ok, after using it for a while it seems that replacing the SD card did not fix it and the problem has returned. To answer NiLuJe's question, it happens at random while using the device, but will also happen while in suspend. This means that sometimes if I leave it sleeping for a while and try to wake it up it won't work.

I'm pretty sure the device is still on when it freezes, considering the frontlight stays on, and when I shut it down the red led only turns on after holding the power button for a while, which is consistent with how it functions when shutting it down while the device is on.

EDIT: Something to note is that when I shut down from a frozen state, it doesn't show the "Power off" screen, it just shows whatever I was doing before.