Cubase 10 & wavelab element 9.5

Hi.
I just bought wavelab element 9.5. I noticed that when wavelab is running, each time I come back one cubase from any other application, I can’t do anything in cubase during 10 seconds. The playback doesn’t stop and I can see the cursor moving but the rest is freezed. That’s irritating. :confused: I’m wondering if the cause isn’t the wavelab exchange feature. Is there a way to deactivate it ?

Each one uses different audio device, though. :astonished:

Any idea ? . . . . . . . . . . . . . . . . Thanks !