RTP is a long-run average, not a promise for one session: 96% RTP means a 4%...

https://lanesmasterchat.cloudhinter.com/posts/how-do-i-pick-a-slot-if-i-just-want-more-play-time

RTP is a long-run average, not a promise for one session: 96% RTP means a 4% house edge over time. Volatility describes how uneven results can be. A short run can go far above or below the average, so don’t treat past results as a forecast.