Blender Crash when selecting UV islands defined with "Border Seam" on multiple Meshes at the same time

[theMotionblur]

I've narrowed the crash down to this plugin, doesn't seem to happen in Blender vanilla.

When editing two or more meshes, Blender can crash immediately when selecting connected Polygon Islands with the "L" hotkey.

Steps to reproduce:

• create a new Scene with the Addon Enabled
• Duplicate the Default Cube so you have two separate cubes
• select both cubes
• enter edit mode
• activate polygon selection
• select a polygon on each cube
• Use the shortcut [Shift-F] and select [Border Seam] to create a boder around each polygon for both meshes
• still in polygon selection mode (and making sure both cubes are still in edit mode) hover over one of the newly created islands and press [L] (use delimit to polyseam as a linked-selection method)
• now repeat the step for the second cube: hover over the newy created island on the other cube and hit [L] again
• instead of ading the island from the second cube to the selection Blender crashes immediately and reliably every time for me.