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

https://chancessmartperspective.nexorafield.com/posts/high-volatility-slots-vs-low-volatility-slots-which-lasts-longer

RTP is a long-run average, not a promise for one session: 96% RTP means a 4% house edge over time. Volatility shapes how wins and losses may be spaced. In the short run, results can swing widely, so you can lose more than the average suggests.