I can report for the past 2+ weeks all of the mixes have shown up and updated correctly. Too soon to call it fixed. I did the more plat/follow/like exercise months ago and it had no effect overall.
Has the issue continued to be resolved for you?
I have been dealing with this problem myself for the past 4 weeks or so. The playlist disappeared from my "For You" section but remained in my library (I added it there ages ago becuase sometimes its easier/quicker to get to it that way than the "For You" tab). However, the playlist that was in my library was much shorter than usual (only 15 songs or so) had almost nothing to do with my musical tastes and included many repeat artist/album tracks which had never happened before. That weird crappy playlist stayed in my library for about 3 weeks. It was then replaced last Friday with another even crappier one (with more repeats artists/album tracks and even less to do with my taste). This whole time it would not show up in my "For You" tab, though would show up in my recently played if i played stuff from it.
Weirdly I continued to get the Favorites and Chill Mix right on schedule with no problems. All other aspects of the recommendations in the For You tab continued to be spot on and clearly influenced by my actual tastes and listening.
Apple Support couldn't do much and kicked it back to engineering. Engineering's only suggestions were to 1)log out of apple music, restart a device and log back in. Predictably, since this was clearly an account wide problem, not a device specific problem (I was seeing the same thing on all five of my different devices signed into Apple Music), this did nothing. And 2) To listen to a more diverse set of artists/genres. I listen to tons of music, from many different artists/genres so this was clearly generic advice, not anything having to do with my specific account. I said as much to my Apple Support Rep (with examples and numbers) who said he would get back in touch with Engineering and forward my emails along.
Weirdly, today, a Thursday, a new playlist showed up, in both my library and in the For You section. This one has about 25 tracks (which is much more normal) has a diverse set of artists and albums (no repeats) and it actually seems to have at least some resemblance to my actual taste in music. It also claims that it was updated on Friday (of last week). I'm not quite sure what to make of this, but I'm wondering if an engineer finally took a look at my account and reset something or fixed a corrupted database or something like that, or maybe I benefited from a system wide fix/change to something or other. Either way it seems like maybe the mix I was SUPPOSED to have show up last Friday has finally showed up today.
Anyway I'll be keeping an eye on things. I'll see if disappears again tomorrow, or if it gets replaced by a new playlist and I'll bee keeping an eye on it for at least a few weeks. I've seen from you guys that sometimes it'll come back for a week or two and then disappear again so I want to be sure it's really fixed before I close my ticket.
