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

https://www.bookmarkzoo.win/rtp-describes-a-game-s-long-run-payout-96-rtp-means-a-4-house-edge-on

RTP is a long-run average, not a promise for one session: 96% RTP means a 4% house edge over time. Volatility affects how often wins come and how large they are. You can lose quickly even on a high-RTP game; short-term results vary widely.