Password changed but app is not asking to update password

Hi

I have configured nextdns as DNS for router and I blocked some games.

My kids discovered the password and installed the app on their phone and started to enable games. 

To reset it have updated the password and I can login with new password to the portal but app is still working without asking to update the password. 

It seems like a bug in the App where it is not realising password is changed and it should be updated at App level too.

Or

I am missing anything at app level?

Thanks

Uday