Amazing how time flows at such times. I thought I was going to have to jump out of a spinning Bulldog some years ago, and went through a series of checks before we recovered anyway (I was observer, not pilot). My perception was of about 10 seconds elapsed - when I put a stopwatch on the cockpit camera afterwards, it was less than 2.
Yes, you need to certainly talk seriously to your instructor about it. Or the CFI?
My best guess would be a bit of muck in the carb bowl, which got into the jet, caused a momentary loss of power, which in itself changed the jet characteristics and cleared the muck.
Or vapour locking?
Not icing I'd guess, that tends to be more gradual and at lower powers.
G