RTP is a long-run average, not a promise for tonight: 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 promise for tonight: 96% RTP means a 4% house edge over time. Volatility describes how uneven results can be. In a short session, wins or losses can differ sharply from the average, and your balance may fall quickly.