Some apps (Spotify, Netflix, Google maps) randomly stop registering sd card, even though settings app shows it's connected, only fix is to disconnect SD card via settings and connect it back again, but it's annoying especially in Spotify because you have to redownload the whole library.
Edit: Formatting SD card helped
Edit 2: I was on a bike trip and it happened again, I guess the SD card doesn't hold in the slot much well, but again settings showed it was connected and Google files showed files on the SD card but SD card option was missing in Spotify. I don't really know how to fix it, but this never happened on the build from June.