No Heli Target still allows heli to rocket the zone.
No Build still allows building in the zone.
No Cupboard allows you to still place a TC.

Also we noticed on our server that has Undestructable true on our helicopter battle zone, now allows signs, campfires, water catchers to take damage and be destroyed by the heli.

I confirm that the flags are not working for No Build and TC.

Just posting 10 months later that these are still an issue and the plugin has not been updated.

Happy Holidays?

This month mine was acting weird as well with one of my zones. Stuff was decaying even with no decay on, and christmas present boxes could not be broken. I erased the zone and made a new one, then it worked after. Try deleting your zone and make a new one to see if it works after.

Well it has been a year now, no reply.

I am having the same issues.

same with flag : nodecay - not working

Anyone out there in the community find a fix for this?

This is only getting worse as more flags seems to be failing. For almost a year now the NoDrop flag hasn't worked and doesn't despawn dropped items. Now the NoSleep seems to not be working either, as people who leave in the zone aren't moved to their designated spots. 

I think all the free plugins have been abandoned. Its sad because a lot of plugins rely on this too :(

Set the zone flags and reload the plugin. After that all flags work.