Table overview is behaving bizarre since we were forced to update to MariaDB on Synology. Data werten't lost, but the table overview shows weird values. These values aren't shown anymore once you open an insert. To understand, check the both files attached. Overview shows the weird value, and the second one shows the insert itself once openend, where the values are correct.
I'm running 4.1.12 and server is 5.5.34-MariaDB - Source distribution