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

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 session guarantee. Volatility shapes the swings; higher volatility can bring longer dry spells. Short-run results can differ sharply from the average, and your budget may be lost.