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

https://varimail.com/articles/does-session-timing-matter-in-online-casinos/

RTP is a long-run average: 96% RTP means a 4% house edge, not a promise for one session. Volatility describes how uneven results can be. In the short run, you can lose quickly or win briefly; results may differ sharply from the average.