Camera settings not persistant

New Fairphone 5 owner with a question related to the camera app. By default it opens in the 7 MP (full screen) mode instead of the 50 MP (4:3) mode. Even after setting this to 50 MP, the app does not retain the settings. I like that double pressing the power butting opens the camera but it’s less useful when I have to go in and change the settings each time, especially if the phone is locked when the camera app is triggered.

Is this a bug or a feature?

Many thanks for any inputs.