Bitwarden App - ALWAYS asking for Master Password

I have been using BW for a number of years - both app and browser extension - and have not had any real issues. However, all of today whenever I try to access the app to autofill an app/site login, it ALWAYS asks for the master password. It has never done this before. I recently switched iPhones and transferred all my apps from one phone to another, logged out and back into the account, but it doesn’t make a difference. My settings:

Vault Timeout - 5 mins
Vault Timeout Action - Lock
Unlock with PIN code - Enabled

I have set it so that it asks for the master password when the phone is rebooted or I log out of the app; otherwise, I expect to enter the PIN.

If anyone can help, TIA.