Hello, I don't know what to tell you as I don't know if it is normal or not. I know I feel like that a lot but it doesn't bother me, I think it is kind of a nice feeling, I don't have to worry about anything. Sometimes it is annoying I suppose, like in a meeting the other day I was asked a question and I was just busy spacing out, not caring because it all felt so faraway and unimportant, but at the same time I knew I was supposed to be a professional and give a professional answer! So it was annoying at that time because I would have like to keep not thinking and floating away in my mind rather than try to connect with what was going on. I think I just said "My mind is blank at the moment" and let the conversation pass to someone else.
So I don't know if it is normal, but it is a bit normal for me. Someone else might have some different words to give you.
Welcome!