Because of that error and its random nature, it feels unsafe to work on the Pspad, so for me the ONLY solution was to use the old and reliable version 5.0.0. It's a shame it doesn't have the nice features of the latest version like folding and more... but the bug with the strange symbols doesn't exist.
-- <https://forum.pspad.com/read.php?4,77267,79622> PSPad freeware editor https://www.pspad.com
