New Bug Encountered:primary color setting doesn't affect the app

Hi,
i had the old theme “blue”; i have tryed to change into the dark theme and after i change back to the light one. But now everything is white, also changing the primary color.
Is that a bug or i’m missing something?

thanks

EDIT.
I just noticed that the buttons change color but only them, not the header etc.

Hi @Mark_11,
We recently made a change to the theme selection and removed some of the older themes. Existing apps will keep their themes, but all new apps are going to have the new ones.
If you have made a change to an existing app, and want to go back to the old theme, you can do it by going to version history (Manage -> Versions) and go back to the app’s version before the change.

For more details about the themes change: