Pop up menu does not stay open

Since the last update i am experiencing a strange problem.
My Pop up menu does not stay open but only in windows I fly out of my main screen and display in my second monitor. It pops up and immediately disappears. I can keep it open if I hold down the center mouse button and pull away from the pop up window.
It’s not a huge deal but it’s quite annoying…
Has anyone else experienced this? Do you think it’s a windows issue or a rhino issue?

issue resolved:

I wish I could say I figured something out or that I’m a genius.
My PC updated this evening and viola, popup menu now behaves as it should.
windows issue, not rhino.

The more I work with this program, the more I love it.

Thanks for the update!