can't change screen time passcode

hi!

I tried to change the passcode for family member's screen time. It looks to be successful and new passcode works on my phone for enabling/disabling Downtime, but the kid's phone does not seem to get the update: old passcode still works.

Out of curiosity, I separately changed the passcode for my own screen time. New passcode is accepted and appears to be changed, but doesn't work. Old passcode still works...

Anyone else seen this??