Driving Focus keep turning itself OFF after manual activation…

I use this focus status solely for the auto-reply because for some reason Apple refuses to add auto-reply features to other focuses.

CONSTANTLY returning to driving focus status set on both an iPhone 12 (work) and 13 (personal) set with auto replies and it’s back to it turned off for no reason.

This question has been asked in other threads before then the thread disabled (annoying) because of no resolution yet dozens of people are marking it “me too.”

*Is Driving focus motion based?* Does the phone shut it off if it senses the phone still?