online blackjack feels rigged, anyone else notice weird patterns?

Lately I've noticed a lot more "streaks" in online blackjack than I ever see in live games, like getting five or six hands in a row where the dealer somehow pulls 21 no matter what I have. It makes me start second-guessing if it’s just variance, or if something sketchy is going on under the hood. I know shuffling algorithms are supposed to simulate randomness, but some of these runs are wild - statistically rare but not impossible.

Anyone else tracking outcomes or patterns in their online play? I'm thinking about keeping a spreadsheet for a few hundred hands to see if the probabilities line up with expectations.