Developer Notes

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When overlapping with another object while moving up stairs with a character, the overlap events (OnBegin / OnEnd) that occur will be called multiple times in an alternating fashion. This will also occur while walking against a wall while moving up a ramp. It seems that the collision is jitterring while moving up the stairs which causes it to overlap multiple times.

If going at a slow pace (tapping the movement keys over and over to slowly move forward) the issue does not occur.

Steps to Reproduce

1. Download the attached project
2. Open the project
3. Press play and go up the stairs in the section labeled "2"
Result: The Begin Overlap and End Overlap strings are called multiple times
Expected: The Begin Overlap and End Overlap strings should only be called once, as they are on the ramp in Section 1.

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Won't Fix
ComponentUE - Simulation - Physics
Affects Versions4.104.11
Target Fix4.12
CreatedJan 11, 2016
ResolvedJan 12, 2016
UpdatedApr 27, 2018
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