I had this and it was a Unity bug, because I tried with scripted set up also without Playmaker. Took days of research and head banging
All I managed to track was that children as Triggers in different layers from parent object, that also have own colliders was ignoring trigger events on builds. Also there was problems when I create trigger object at runtime.
Test to separate them as root objects without parenting.
If you have a trigger created at runtime, instead try to put in the scene and activate it.
Hope you find the cause and the fix.