I forgot to add that not only will they change "currently playing" every 3 secs, also the cover art of each series changes, as an A/B test. So if you use that as a visual confirmation, well tough luck.
In the case of Netflix, there's a reason for all of this. They don't really want you to go and sniff around the catalog in easy ways. You might discover its not great. Best to throw a bunch of random stuff in your face to give you the illusion of a fabulously rich and "dynamic" experience.
The distraction UX of Netflix is intentional. In the case of Spotify it's mostly incompetence.
But if you are interested in the why of "currently watching" moving all over the place, you'll notice its harder to find the longer its been since you opened netflix combined with the faster you start looking for it.
Different part of Netflixes backend respond at different speeds. The call for "Top in the US" is likely cached and up to date, the call for "What did dataengineer56 stop watching" is probably cold and slow.
This leaves netflix with a few options, and what they seem to have settled on is "Show everything that has loaded, and quietly insert the stuff that loads later into parts of the screen the customer isn't looking at, so our entire app seems to load instantly"
I would say that Spotify does not compete with traditional media players, it competes with radio.
If i want to listen to my favorite songs, there is no reason to use Spotify for that. But if i want something different-but-similar and i do not really know what, because i am not very interested in music, then discoverability of new music by Spotify is game-changing.
I think Apple Music got it right. I like how you can start a radio of any song. Or just play your own favorites.
Which is particularly surprising since they have multiple teams of highly compensated product people who are supposed to be guiding the overall product direction and preventing just that kind of incoherence.
Spotify internally has a model where they have a large number of small teams where each is responsible for only a tiny part of the experience. Possibly this leads to a lack of a coherent experience. The other factor may be the constant experimentation.
Frankly, 20-30 year old media players were better. So what the point of it all is...I have no idea.
Quite similar experience with the Netflix app where it seems every single day I have to wonder where they put my currently watching series.
Ironically, we look up to these companies for their engineering culture. We really shouldn't. It's a hot mess. Toy tech. Deeply unserious about quality and customers.