Nuendo looses apollo assignment often

thank you. I have an apollo x8p as my main interface and it seems like if there is any disturbance at all (something gets turned off, etc) then Nuendo reverts to built in audio (or something else) sometimes I lose the orange mic icon too. is there a way to stabliize this? something in preferences? thanks so much.

Hi, if I turn my interface off, I get this dialog:

But as soon as I turn it on again, if I don’t click anything, it recognizes it and goes back to working as it was. My only audio connections are in Control Room, but they don’t lose their routing.

What is different for you?