I've been getting some problems related to this brush entity/similar cases where an output is fired without even making it to. In my case, I've put some trigger_once entities and added "OnStartTouch" outputs in them. One of these outputs will disable another trigger. The problem is this: the trigger that is supposed to be disabled by the trigger_once entity is automatically disabled at round start. I've checked that trigger's inputs, and the trigger_once is the only one that disables it. The trigger's default state is set to Not Disabledd. Wether or not it's a feature, I've never heard of it. I can still solve this bug with some special inputs from other entities, but it shouldn't be happening.