I've encountered many players casually flying around the map until he/she was banned by a moderator. Sentinel's actions can be very delayed at times and it's very common based on my own experience.I don’t know where do you play but on my matches Hackers are getting banned in 5 seconds,
This is the exact reason why many players are dependant on the anti-cheat to perform its task. Players using LabyMod (a large portion of the CubeCraft community) are unable to report players with evidence using the LabyMod client as you're able to alter players' names.but you can help Cubecraft by reporting them. https://reports.cubecraft.net