Created this Syntax Search. Hit Search. So far, so good.

In the search pane noted that I had selected "All Passages:, but I wanted the Pauline Epistles. Selected my range "Romans - Philemon".
CRASH—Repeatable.
When I select "Romans - Philemon" from the Syntax Search pane and then click "Search", Logos does not crash. I have never tried this scenario previously, so do not know if this is a new problem of a previously existing one.
Summary: The crash only occurs when changing the range from the search pane after running a syntax search.