Is it intended behavior that colliders stop receiving OnTriggerStay2D events after a while (presumably when they stop moving and physics puts them to “sleep”)?
I’m seeing an issue where the event stops being called eventually. A ball falls into a cup, which has a trigger collider. I’m using OnTriggerStay2D with FixedUpdate to build a list of objects in the cup each frame. However, once an object comes to rest, I stop seeing the events.
I’m wondering is this a bug or by-design? Is there a way to disable sleeping on these objects and presumably fix it? In the meantime I’ve added a script that adds a small random force each frame, and this seems to correct the issue. But I’m curious to know if anyone can shed some light on this behavior.