This is a regression
//UE4/Release-4.27 CL18319896 Binary
//UE5/Release-5.0-EarlyAccess CL16682836 Binary
Under the same conditions in UE4 the On Hit events fire accurately and as expected. In UE5 the On Hit evets are sporadic and inaccurate. Observing the ball closer some times it doesn't connect with anything and starts bouncing up.
Every time the Bouncy Ball Actor would bounce from hitting the Floor "Hello" would be printed.
Some times the Bouncy Ball Actor prints "Hello" when hitting the floor.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-137155 in the post.