Level Design Booby trap grenade does not function

[CannonBall]

Currently the Japanese ground planted booby trap grenade does not function on my custom made RSTE map.
How do you enable it to be used on a maps terrain ?

(The map in question has been cooked and I am not playing in editor).

 

[Beskar Mando]

Currently the Japanese ground planted booby trap grenade does not function on my custom made RSTE map.
How do you enable it to be used on a maps terrain ?

(The map in question has been cooked and I am not playing in editor).

Can you send me a file of the map I may be able to help. But sitting here asking questions won't. Only thing I can think of is something to do with terrain. It's not somethign you can turn on or off.