Client class creation enabled itself?

Hello,
I disabled “client class creation” before production months ago but today i realised the feature was enabled itself, i’m pretty sure it was disabled before the new dashboard theme.
It can be bug or something?
Thanks.

I don’t expect it to be a bug. It works to disable it now again?

I disabled it right now but if it can enable/disable itself i guess this can cause a security problem.

Yes, I understand. I don’t know what happened.