I doubt it’s gonna be a software issue.
Most likely the power supply or the dongle is dying.
Anyway that’s my guesses.
If you want to further diagnose the issue you’ll need ssh access:
For Beginners - How-to SSH to RPi - Setup Putty in Windows
While configuring that, it doesn’t hurt to reimage the sd-card with a fresh image as you have the sd-card out anyway.
(For Beginners - How to Get Back Existing Station Number in A Fresh Install)