Hmm. When I learned to play Solo recently I suddenly found it really odd to look at a (say) seven-digit number which had a repeated digit; I'd got so used to ensuring that never happened that I felt a subtle wrongness if I caught sight of, say, a catalogue number on some packaging. Is that the sort of thing, or are you thinking of glitches that have no obvious relation to the new thing being learned?

Things that have no obvious relation to the new thing, sort of.