set my zone flags up as undestr and pvpgod and can still blow up walls and get killed 

Same problem here, all public areas like heli arena and town can be damaged with undestr true confirmed here.

is there a fix fro it or going update the plugin

After the new Rust update and new Oxide update today, the problem with "undestruc true" not working, is now working for us.

yeah all fixed now just have update to new oxide and zone flags are fixed