It’s under general>other>default feed. I don’t think that’s what’s causing it, but it does mean I see the list of subscribed communities as soon as I open the app, which I otherwise prefer. Swiping a community to the left unsubs from it, no other action required.

On Android with my default feed as “list.” Like I said, I do not browse by “all,” “subscribed,” or “local.” I go to a community sorted by new to catch up on every single post there. I don’t enjoy missing posts or scrolling indefinitely, so I make sure to see everything in the specific places I frequent.