@This solution worked for me for both issues i had - mentioned by you and issue with Opera clearing all data when qutting.
@burnout426 said in Opera is not saving data (or it's being removed):
Test this solution. Remove the Opera Safe Store password from Keychain Access login item.
Steps:
Open Keychain Access application
Choose 'login' keychain on left
Choose 'Password' group
Find 'Opera Safe Storage' entry, right click it and choose Delete.