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

https://brookssimpressiveop-ed.wordcanopy.com/posts/how-is-casino-volatility-similar-to-portfolio-risk

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. In short sessions, results may differ sharply from the average—you may lose quickly or win unexpectedly.