It has been happening a ton tonight, past eight hours at least, and it has been happening most nights but not nearly as bad as tonight. New image uploads are usually erroring out during upload (upload failed try again error) or after while the image is being processed and resized, it takes multiple attempts to upload just about any image.
Once images are added refreshing just shows empty image holders most of the time, refreshing doesn't help so it just usually takes 30-90 seconds and the image will appear. Images are also having trouble loading when creating new thumbnails while browsing a volumes issues in the grid, viewing the issue ribbon, the browse pages, the small thumbnail in search is taking a while to update for changed default images and galleries are loading slowly most likely cause of the new thumbnail creation, some times they load empty with just viewable html/css elements, when gallery images do load if there are too many it won't go past 30.
Probably has something to do with replication server to server or the image processor is lagging.