I'm finding that running Yast Software Management (sw_single) on a two monitor
setup, it crashes when not shown on the primary display.

Steps I can use to reproduce:
Open Yast2 from the application launcher.
Move the Yast2 window onto the non-primary display.
Click to open Software Management.
Software Management window opens, goes through the "Initialize the target
system" and "Load the configured repositories" stages, then disappears.

Steps/workarounds I can use to eliminate the error:
I can open Yast2 on the primary display, and I then have no difficulties.
If I click and hold the mouse button on the title of Software Management while
loading/initialising, it then displays properly.