[0.4.5.2] Characters mixed together after exiting and starting the game

I’ve came across this pretty peculiar problem or bug that the 2 characters (both classes) that I’ve created have somehow been mixed together. When I opened the game and tried select the last played character, I noticed that it’s displayed twice and after entering the game both of the characters share the same items and skills.

https://imgur.com/a/ygehf

Unfortunately I haven’t found the path to the characters files to check how they were altered, but I assume this can be reproduced.