I was trying to add custom validation in gluu 3.1.4 docker edition from /identity/attribute/update for password field. I added ^(?=.[a-z])(?=.[A-Z])(?=.\d)(?=.[@$!%#?&])[A-Za-z\d@$!#%?&]{8,20}$ in regex pattern and checked the enable custom validation for this attribute option. But after this changes when I tried to update password or add people from Users section or password for exisitng user it's not validating the the regex. Let me know if you need more info.