Cubase selects events/clips after app come back in focus

Hi, this is a bit random behaviour, I couldn’t find a way to reproduce it 100% of the time, but following the steps below it happens quite often.

  • Sequencer window full screen
  • Focus on another open application (Google Chrome…) on top of Cubase, not full screen so you can still see some of the sequencer window in the back
  • Simply left click once on an empty spot of the sequencer window you see behind in order for Cubase to be back on top
  • Now a group of events/clips present in the sequencer window are randomly selected, as if I clicked/selected with the standard cursor

To me it looks like some sort of “lag” between the pointer and Cubase, as there is a very short display freeze/hiccup when the switch occurs.
I had the exact same setup/settings on Cubase Pro 7-7.5-8-8.5 and this never happened, it started witn Pro 9.

Cubase Pro 9.0.10
Windows 10
Mouse : Razer Naga Hex