Some 4K clips gone

While I was checking to see how my files had been affected by the P5 pricing test, I noticed quite a few files that I had shot and uploaded in 4K were now only listed as HD. Has anybody else noticed this? Is this part of another test?

I looked through a bunch of my files (although not all) and it looks to me like all my 4K stuff is still there. Probably 60 percent of my uploads are 4K, so it would be easy to miss one or two -- but I probably wouldn't miss 10 or 20.