Can anyone confirm this problem?

Draftsight V1R3.1 x64 on Windows 7 Home Premium SP1

1) Create DWG file #1 with 2500 entities

2) Create DWG file #2 with a couple entities and an attached xref to file #1

3) Create DWG file #3 with a couple entities and an attached xref to file #2

4) In DWG file #3, draw some entities and try to snap to file #2 and file #1 entities. Snapping to file #1 entities does not work correctly. Snap hint indicators don't work and clicking on a snap point takes very long to process.  Can't snap to center of circles.

In our work drawings we have a civil drawing as the base plan of a 3 level xref which has much more than 2500 entities.  This issue makes it impossible to work in a file and snap to the civil entities.

Simple Test Case FIles Attached  (alternate link:   xref-test-files.zip )

xref_level-1.dwg - Simple drawing with 2500 entities

xref_level-2.dwg - A few entities and an xref to level 1 dwg

xref_level-3.dwg - A couple entities and an xref to level 2 dwg (this is the file that exhibits the snapping problem)