Horizon mode issues, android.

I can browse inside a community in horizon mode but not the... what would you call it.. the main feed? The master feed? The feed that shows all the posts from all your communities. More importantly, I also can't type in horizon mode only portrait mode, which I find really uncomfortable, and causes mild pain in my wrist when I try to do it for extended periods of time. Which was the main reason I didn't use my phone's browser for imzy either.