Basically this: https://forums.bistudio.com/topic/194501-conversion-issue-to/

Bohemia has completely fucked my server. Data can no longer be read/referenced from the database because of these duplicating characters.
When converting toString(array) and toArray(String) the HEX values 34, 39, 96 all duplicate for no apparent reason.

This all worked fine prior to the last update.

It needs fixing immediately!