2.13 - 10491 / Consistently crashes on immediately on "Split and Optimize Cluster"

2.13 - 10491 / Consistently crashes on immediately on "Split and Optimize Cluster"

I have ended up with an untagged group of 161 photos.
It makes no sense since the photos on it are extremely
different, different well visible people, different day,
different place.

There is no relationship between them that I can find.

However, when I click on  "Split and Optimize Cluster"  the application crashes 
immediately.

In total 27,500 photos / versions ingested/ added.