Flight not working
When I use entityflight on a boat it keep rubberbanding and sometimes the game even crashes and I can't get out I tested it on singleplayer with the same issue. All other entites work fine so idk what it is. I have a good pc and a really good graphics card so idk whats happening.
Rubberbanding is caused by anticheat, there is nothing that we can do about this.
If your game crashes, send us the log (.minecraft/logs/latest.log) with https://paste.ee