Not sure, but you coukd try zo change that in pocketmine.yml Code: anti-cheat: #If false, will try to prevent speed and noclip cheats. May cause movement issues with some blocks which are not yet properly implemented. allow-movement-cheats: false #If false, times block breaks to ensure players are not cheating. May cause issues with some blocks which are not yet properly implemented. allow-instabreak: false
Update your pocketmine.yml. The server doesn't auto update it after you've used an older PMMP Build like 1.0.16.