RTP is a game’s long-run return: 96% RTP means a 4% house edge on average, not...

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

RTP is a game’s long-run return: 96% RTP means a 4% house edge on average, not a session guarantee. Volatility affects how wins and losses are spaced. Short sessions can swing sharply, so your results may differ widely from the average.