Started doing it again. Maybe the latest Win10 update. Anyhow Cubase 10 works fine and WL10 exhibits problems with the ASIO driver. Several things have been observed, including WL10 crash when Play is hit, all entries in the audio device dropdown disappear after clicking ‘Reset’, failure to do anything when ‘Play’ is hit. I suspect they are all related to an ASIO problem in WL10.