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

https://oscar-wiki.win/index.php/Why_Do_Casinos_Advertise_RTP_If_It_Doesn%E2%80%99t_Predict_My_Results_Tonight%3F

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