WaveLab 11 doesn't release audio driver when quitting

Wavelab 11 latest release… Big Sur Latest version… MBP 16

MOTU 64 is computer interface… everything works great… then I quite Wavelab 11, and no audio from any other program, Spotify, Protools, RX, Logic, web browser… nothing…

The audio interface is still in the list of drivers, but nothing is going to it… re open Wavelab 11 and audio works, close wavelab 11. no audio… reboot computer… everything works just fine, until I reopen Wavelab again and problem returns…

It seems like Wavelab isn’t releasing the Audio Driver on my Mac???