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

https://front-wiki.win/index.php/Variance_vs_Volatility_in_Slots:_Are_They_the_Same_Thing%3F

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.