This mod breaks my grappling hook mod, so I investigated a bit. The on_trigger_created_entity
function removes any trigger entity, it should really check that it's one this mod is responsible for. Also I'm not sure why you would even create the entity if you just destroy it and do nothing with it, but it might make sense in context.
I'll look into it, and see what I can do.
NGL, it's been 2 years since I wrote this, and I couldn't tell you why I did all of what I did, heh.