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

https://www.quantifiedstrategies.com/rtp-variance-and-expected-value-applying-a-quantitative-framework-to-online-casino-gaming/

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.