Impostor collisions don't work correctly

When I register a function that should be triggered when box impostors collide, it doesn’t always work. Every other time. But in fact, a collision occurs. Has anyone encountered such a problem?

There might be different factors influencing this, such as the objects speed, simulation speed, substeps ( Advanced Physics Features | Babylon.js Documentation (, etc. A playground reproduction of the issue would be very helpful for us to tell what’s going on. :slight_smile:

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