We already created users in the database without changing their form settings.
After some days, the problem persists. We cannot always make new users and apply form settings to existing ones since they also have their own Form Settings, which will make their updated Form Settings to be overwritten again.
I will now try to update into 8.82 PL13 or 13.5 and see if there is an update. I've checked one other forum that even in PL13, the problem occurs