I can't really tell, because I can't know for sure what you experience internally, but I felt similarly a few times, and I think that calling that "personality"

I can't really tell, because I can't know for sure what you experience internally, but I felt similarly a few times, and I think that calling that "personality" is not appropriate. I believe you are talking about "behavior". We can display different behaviors in different contexts and that can still be perfectly coherent with our personality. In fact, I think that realizing about those details that make you behave differently, even when you initially think about the situations as "similar contexts" is really helpful in getting to know yourself (and others near you) much better, and finding out about the often most subtle and yet most unique details about your own personality.