Mating context pop up menu sticks

Is there any way to turn off the context menu that pops up when adding mates. For whatever reason half the time this thing pops up & then sticks & won't go away. If you then pick the sticky one accidentally when adding mates, SW crashes. It sticks when you go to any of the other types of files (parts & drawings) as well & makes a place you can't pick anything in. Only way to get rid of it is to close SW & then it crashes when you close it. This is on 2017 running Windows 7 with an Nvidia quadro graphics card with the updated drivers.

SolidworksAssemblies