Hm, this sounds like things are not perfect there. Dave, OK, tell me something? Is the reason for your post relating to the option in the Cubase Mixdown/Export window to open the subsequent audio file in WL? To use this feature I have to check the boxes I described, make the mixdown/export, and then reduce Cubase by clicking the Cubase taskbar icon. With me?
When I do this it’s all good, smooth as silk with no hangs or audio dropout. In your case, it sounds like your DAW ultimately recovers as you go from Cubase to WL? Hm, mine does not, the audio will stay with Cubase and not make the ASIO driver transfer.
I wonder if you should try what I suggest for a smoother transition?