Water Body Custom | Overlap events are not triggering

I try to make a simple water system, that allows character’s swimming, but i have a problem:
for some reason overlap events for water body custom such as EventActorBeginOverlap and EventActorEndOverlap are not working. I dont know, it’s a bug or may be i’m doing something wrong?
Steps:

  1. Add Water Body Custom to the scene
  2. Create a blueprint from this component
  3. Add Events in the graph

If i try to add events for Water Body Lake, it works as expected.
Thanks for any help!