In the last week, the high resolution basemaps from World Imagery are noticeably less detailed. Is there a reason this is happening?
From what it seems like and sounds like, this is a "spotty" error. Meaning that, this only happens in some cases/places and may even happen after an update (which is really unfortunate).
I don't know if this helps or not but Esri now has a way of viewing historical imagery in their "way back" maps from living atlas.