Just wanted to comment and let you know you're not the only one with this problem. I recently started using Armbian on a S805 box I have laying around and get the same thing too. When I set a swap partition to either a USB stick formatted for swap or a swap file I made in the internal memory I get errors similar to yours.
https://imgur.com/a/IjsxdUF
This is a picture of the error I get when the system tries to swap memory. If anyone wants to replicate this, add some swap space then run the command:
stress -m 4
and it should lock up. The "stress" program can be installed by typing "sudo apt install stress" I would really appreciate if someone could make sense of these errors and provide a fix.
