To fix a bug, they have to know what it is. It's still not clear to me what's happening. If it were, I'd have opened a ticket.
The usual scenario when there's a problem with image uploads is that the reviewers run into it first, because every review contains cover art. So far, though, none of the reviewers are reporting problems (me included).
Can you lay out -- in detail -- the exact procedure for reproducing the problem? Huddler does read this area.