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

https://www.bookmarkmaster.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 describes how uneven results can be. In a short session, results can fall well above or below the average, including a loss.