There is dissociation. There is also something people don't talk much about too, about memory. Memories can be strongly linked to places and emotions. Almost like you instantly forget a dream you had, even if you just woke up from it, you can almost reach it but it's oddly gone, you think hard, it is still gone. The next night you are almost falling asleep, and suddenly! you remember the dream!

Daytime memory can be like that too, especially when you're going through hard times. You might remember the last convo if you go back to the same room and sit in the same chair. Or you might remember it if you happen to be in the same mood. Memory is really a strange thing.

But yes, could be dissociation too, hiding from the pain.