Hey ​@M A R I U S, thanks for reaching out! That sounds frustrating, let me help sorting out this issue. I wasn’t able to reproduce the issue on my end, so I’d love to get a bit more detail.

• Is this happening in the browser, the desktop app, or both?
• Have you tried clearing the cache to see if that helps?
  For the desktop app: Clear Desktop Cache
  For browsers, here are guides for each:
  • Google Chrome
  • Safari
  • Mozilla Firefox
  • Microsoft Edge

If possible, could you share a screen recording of what you’re experiencing? That would help us understand better and look into it further.
Thanks in advance! 

Hey Gayani, thanks for your reply. I’m on the latest desktop w latest Mac OS. I figured the issue:

• I have favourites in my sidebar and then I have a new Section.
• When I try dragging an item from favourites to another section it jumps back
• Apparently an item can not be in two sections at once, favourites seems to count as a section.

I have solved this by assigning it to only one section manually, maybe this is intended maybe this isn’t intended behaviour :)