RTP is a long-run average, not a promise for tonight: a game with 96% RTP has a...

https://wiki-cafe.win/index.php/Why_Do_I_Lose_Fast_on_a_High_RTP_Slot%3F

RTP is a long-run average, not a promise for tonight: a game with 96% RTP has a 4% house edge, meaning the casino keeps about 4p per £1 wagered over time. Volatility shapes how wins and losses are spaced; short sessions can swing sharply either way.