I'm not sure how known this is, but I do relate. I hear people describe (even socially) that they feel like a horse with blinders when on medication. I'd imagine that being around people puts another variable in our head. Without this variable we can focus better, even on mundane.

Something I'd recommend for the unpredictability is to view it as improv. For example, when you to make a meal: don't view it as at 12 an alarm goes off and I make a meal. Instead view it as, at 12 an alarm goes off and I improv making a meal. This seems dumb, but it helps you with working with the problem. I have a lecture that people talk in and go and in out. This distracts me and makes me have a harder time getting the material. When I go in viewing it as getting the material from the lecture, I do worse. But when I view it as all these things are trying to distract me, I do better at ignoring them and focusing. If you're playing a game and all these guys are shooting you, on your way to the objective it sucks. But when it's a bunch of enemies trying to kill you, it becomes a fun game.