Have the solution. You have 2 save it as an integer, means that 1.0 is not correctly. Here should be a 1.
A 10 times stack would be a 10 then, not a 10.0.
Had no problems to change to this. Stopped the server, activated expert, changed to 10 and saved, restarted the server and watched in the settings, it was still at 10 and didn’t change back to 1.0. So no Comma, no sign behind it. Just the integer.
Just checked on the server - works.
edit: you don’t have to load a backup btw