I find myself coming out of the zone when someone comes up to me and talks to me. I feel baffled, stupified, and really confused about almost whatever they are

I find myself coming out of the zone when someone comes up to me and talks to me. I feel baffled, stupified, and really confused about almost whatever they are asking about. It's obvious to them, and 60% of the time they find it extremely bothersome because I'm nearly unable to focus on what they are asking after because I'm heavily processing whatever what was flowing around my head. The result is that I feel irritated and being interrupted, and they feel put off because I'm not paying enough attention to them. Thus my most productive times when really digging into something are something like 6pm - 9pm in the office, alone.