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

https://wiki-byte.win/index.php/What_Does_%E2%80%9CRisk-Adjusted_Return%E2%80%9D_Even_Mean_for_Gambling%3F

RTP is a long-run average: 96% RTP means a 4% house edge, not a promise for one session. Volatility shapes how often wins land and how large they may be. Short-run results can swing sharply, so you can lose more than expected.