Maybe they faved and then unfaved it?

*shrug*
I've just seen this happen on lot on multiple accounts

It's not happening to me though.

That's really odd. I hope there's not some sort of issue going on with this site.

I may not upload content here but that's definitely a problem if it continues to be a thing. Creators should be able to see what's going on in terms of their content whether it's feedback or even just people giving it a favorite and moving on.

Either way I hope it gets resolved on the way or another.

Sometimes people opt out of having their favs public.