PreventPreventItemSwapLagExploit - dniym/IllegalStack GitHub Wiki
ON BY DEFAULT - Affects MULTIPLE Versions
Prevents players from using a glitch that allows a malicious player to swap held items ultra fast causing nearby clients to lag and disconnect / crash.
To enable / disable this protection use the following command: /istack toggle PreventPreventItemSwapLagExploit
This protection has no extra options.