yes missing time can happen under many different situations with many different normal, mental and physical problems too...

you ever here the saying ...sorry I didnt get back to you sooner I lost track of time.... thats what it means the person was so busy with their life that they dont always keep track of every single detail of their life and dont always keep track of the time.

I no longer have alters and sometimes I come home from work and my wife says how was your day and I say good, cant tell you half of what went on because I have no idea but it was a good day.

my wife went out of town for a few days and when she came back the only thing she could remember was the hotel had a great menu and it was a great class reunion. but more details than that it was all fuzzy, run in together and a bunch of i really dont remember...

Another example rape survivors usually dont remember all the details. they may remember the abusers face or hands and not remember anything else...

the brain is an amazing thing it only keeps what happens to be important to us at the moment that something is going on. each person has their own ways that they remember things. and in most cases there are normally gaps in a persons memory where they have spaces of time in which are not accountable for.