Hi @TeamSuper don't worry! There are two different types of backgrounds you can add when you go to Preferences: profile background and user card background.
The profile background is the one that appears when someone goes onto your actual profile, which is the image that is working for you. If you'd like a user card background, which is the little card that appears when you tap on your profile picture, you need to upload a user card background in your Preferences. It can be the same picture if you want.
Do you think you could rename the topic to something like "Profile background" so that it's easier for other people to search up?
Thanks I know now I was wondering what the user card meant thanks