I had this issue and it turned out to be fluctuations in the power source. Purchased an official RPi brick, and put the root filesystem into read-only mode and

I had this issue and it turned out to be fluctuations in the power source. Purchased an official RPi brick, and put the root filesystem into read-only mode and the Pi became much more resilient. (https://www.raspberrypi.org/forums/viewtopic.php?t=161416 https://www.raspberrypi.org/forums/viewtopic.php?t=161416)