It doesn't sound like you're seeking medical advice,just asking a simple question which is perfectly fine and what this place is for.

It's possible it could be dissociation but I guess you would need to talk to a therapist or other professional about it to know for sure.Many times people are told what they experience is normal and nothing out of the ordinary and it really might not be.When I was working I once had to be told by coworkers that my shift was over and it was time to leave.Time passed so quickly that I was shocked when they told me.If I had came here and started a thread about it I probably would have been told it was just normal that getting so into what you're doing and losing track of time like that is common.It is common and not really that big of a deal.But I had DID and wasn't aware of it.So I guess what I'm saying is it's never a bad idea to run questions like this by a professional so they can see the big picture or the whole story.If you're questioning this you must have concerns so it might be a good idea to do that.

But it's also good to ask questions at a place like this too.I know many times people asking questions can lead to seeking help in real life.So it's a good thing.