I am also experiencing this transparent.png bug. I had updated from 2.1 to 2.2 today without realizing the issue and have run the following.
 pry(main)> OnceoffLog.where(job_name:"RecoverPostUploads").count => 1
I do not have Cloudflare enabled and pictures are stored locally, though the server is accessed by a proxy.
Before doing the above, I had run an rsync to add the missing images back to the uploads directory; this resolved some problems but not those with transparent.png being listed. The most recent post affected was from August 12.
Do I simply need to wait an hour as Sam had mentioned, or do I need to do anything else?
I wasn’t sure if I should start a new thread or piggyback off of this one; I opted to piggyback.