Always asking for audio harware

Whenever I launch Nuendo 12 for a new session, it throws up a dialogue, asserting that new audio hardware has been found, and I must make a choice. Again. every time.
No hardware has been added.
I have had this problem since Nuendo 10. I have noted that the problem only occurs on my workstations that have Thunderbolt attached additional monitors (screens). My old trusty Cheese Grater Mac never suffered this doubting of reality on the part of Nuendo. And the iMac Pro I use as a side workstation doesn’t complain either - it has not additional monitors attached.
Can this please be sorted as, with the number of crashes that seem “normal” these days, it is a rather Groundhog Dayish experience. Minus the humour.