I'm currently researching a phenomenon I regularly experience when watching movies, TV shows, or videos that take place in a fictional world or contain fictional elements. I often experience symptoms of derealisation (feeling distant from reality, foggy, etc.), with the addition that my mind feels "stuck" in this fictional world and that every thought I have happens there. It's difficult to explain, but basically my brain thinks the fictional world is reality. I'm still aware that there is the "real" reality, but as mentioned previously, it feels distant and almost as if I see a fog around myself. It's hard for me to get my mind back into reality, and I usually realize I'm in this state only when I detach from the media, e.g., pausing the video or when the movie ends. It lasts an uncertain amount of time, and it makes me uncomfortable and unable to do things that require me to be in the "here and now" e.g., having proper conversations.
I came across things like "maladaptive dreaming" but those don't seem to describe or be what I'm experiencing; any help would be appreciated.