You’re right, there’s an issue with profile banners and avatars. Thanks for the feedback, I’ll get it fixed soon.
Discussion
Oh good! I started to believe I'm stupid 😅
No, you’re totally right, it was a bug and it’s fixed now 🫡

Yes it works now, except the avatar image in the bottom menu bar.
And it seems that loading in the note works but clicking on the image results in an error: