I used to dream about software development flaws applied to "reality". E.g. I've had radios in my dreams that wouldn't turn off unless I unplugged them because they didn't properly implement graceful shutdown. Or microwaves I couldn't physically use because I made that function private instead of public. Usually it was more like a nightmare - all sorts of things not working for nonsensical reasons.

I play Scrabble competitively/obsessively and I certainly have dreams about tiles and crazy anagrams and related situations constantly pop into my head while trying to fall asleep, especially at tournaments.

Hah! I played a lot of chess as a kid (competitively). I assure you I dreamed about it plenty.