Sure it's normal, but that's not what I was getting at. There hasn't been a case where the Doctor had lost a significant chunk of memory for more than part of one episode of the TV series.
The incident in The Face of Evil was retconned as happening during the that brief moment in the episode where he starts to leave after he regenerated, but you don't really experience any extended screen time spent with people who knew him where he doesn't remember them, as far as I can think. Like, what if for a large portion of the series, his last memories where being his first incarnation. That'd be weird. But anyway, I seriously doubt that would happen.
Edit: Someone apparently tried to hear the dialogue going on in the recent filming:
! > "I’m not on the phone, I’m right here. I’m standing in front of you."
After they stop hugging…
Clara: Where are we?
Doctor: Glasgow
Clara: Right, (….) Scottish accent
Doctor:(….) I could go for chips. Chips! I could go for chips!
Clara: (….) You’re buying!
! *(….) means that they said something I didn’t understand
! Right, Scottish!