why did sydney and isaiah break up

Sydney and Isaiah broke up primarily due to Isaiah cheating on Sydney. After dating for over a year following their time on Love Island USA Season 4, their long-distance relationship was marred by this incident. Isaiah got blackout drunk at a birthday party celebration at the Jersey Shore, during which he kissed another woman. Sydney found out when Isaiah sent her videos of the act, which he has no memory of due to being intoxicated. Sydney called off the relationship immediately after seeing the videos. Isaiah said he tried to console Sydney and win her back, but Sydney wanted to talk face-to-face, and Isaiah couldn't afford the trip to see her. This event and the inability to reconcile in person led to the breakup. Despite the end, Sydney has spoken about their relationship having real love, and Isaiah expressed remorse over the incident and the breakup.