Hi,
i was using the "NoFallDamage"-Flag last wipe in a jumping puzzle. Worked as intended.

Now we still get Fall Damage. I tried following already:
-reloading plugin
-checking if any zone overlaps (no child/parent zones, too)
-disabled/enabled flag again

I took a lok into your hook:

private object OnEntityTakeDamage(BaseCombatEntity entity, HitInfo hitinfo)
...
HasPlayerFlag(victim, ZoneFlags.NoFallDamage, false)
...​

You function HasPlayerFlag return always false. Doesnt matter if the NoFallDamage is enabled or disabled :(
(Same for NoDrowning btw)