"Separate" command seems to fail with large splat selection

[vincentwoo]

I'm trying to separate out 11m splats from a 13m splat scene, and separate runs for a while (tab freezes, click on wait), but when control returns they're all still in one splat. Editor continues to function as per normal.

A smaller selection (~5m) works.

[vincentwoo]

Inverting the original selection (going for the excluded 2m splats) and then separating also works.