A new settings.yml option has been implemented to assist users with servers that have custom knockback. All you have to do is set the option to true and limitations will be automatically adjusted.
Logs:
Corrected several NoSlowdown item-usage high latency false positives.
Corrected several Velocity wall false positives.
Corrected several vanilla-fly movement false positives.
Implemented a new settings.yml option. (Protections.custom_knockback)
Corrected a Velocity compatibility problem with custom knockback.
Corrected several Fly calculated high latency false positives.
Corrected several Velocity shield false positives.
Greatly improved the Combat utilities.
Corrected several Clip vector false positives.
Corrected several KillAura targeted-area false positives.