Anyone else facing the issue while trying to update the item?
I was trying to update the thumbnail of the item and it got stuck with processing…!
Tried from Chrome and Edge, no luck.
If I wait some time, I get this message too! File size is just 15 kb.
Same for me 
me 2
hi i recommend that u open a new window in your browser and do again to your dashboard and restart the process of uploading from sractch … this is very possible that your thumbnail failing to upload supposedly indeed was done and that there is a bug, the same thing happens to me rather regularly about the main file …
Update: This issue was solved for me today morning.
good happy to read just this 
