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

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

RTP is a long-run average, not a session promise: 96% RTP means a 4% house edge. Volatility describes how wins and losses are spaced. Short-run results can vary widely, so you may lose more—or win more—than the average suggests.