I have had this happen, and I blew it. Went through all thr interview rounds, then was offered a lunch with prospective manager and someone else. They want to see how you treat work, behave outside of strict interviewing mode. Basically, if you badmouth anyone, talk about people behind their back, and how you approach the business. My mistake was I went off on a tangent about how service management/intake process was crap in my current role. This was very early in my career, like 2nd job in my career.
OP, basically do not talk about anything negative in your current role. Relay everything in positive context. Be normal, talk about sports, walking the dog, etc. Do not talk about anime.