Question about the source code of Lumen radiosity that there is some light leaking caused by the spatial filter in the SW tracing mode.

Development Rendering
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Hi, I wonder why this code line is commented out? It causes some light leaking because a neighbor probe can come from another mesh card. Is this code line causes performance issue or visual artifacts?

https://github.com/EpicGames/UnrealEngine/blob/6978b63c8951e57d97048d8424a0bebd637dde1d/Engine/Shaders/Private/Lumen/Radiosity/LumenRadiosity.usf#L195