RTP and house edge describe the long-run maths, not what a single session will...

https://danteuoqx487.theburnward.com/what-does-millions-of-spins-mean-for-my-one-hour-session

RTP and house edge describe the long-run maths, not what a single session will return: a 96% RTP means a 4% house edge on average over many plays. Volatility describes how uneven results can be—smaller, more frequent wins or rarer, larger swings