(Hi, first post here at DZ. Hope I don't have to regret this in a few years when I look back at old posts).
No need to worry. I had this happen on the tandem we did before starting AFF. Next time, I just held my chin up a little bit more and smiled and that solved it. Same thing happened to a few others in my class as well, but smiling seems to have done the trick for everybody. My tip would be to not overthink things, just focus on the program.