My Z4 won't answer me anymore!

[PaperSniper]

I drive 90% of the time with the top down, so I don't use my BMW's "voice recognition" very much. While I do have Android Auto in my car and phone, I only rarely use it. Occasionally I do ask my car to dial the phone, enter a navigation destination, etc; using the BMW's system, not AA. That does not work anymore, she simply will not reply to me since about 30 days ago. Have I offended my car? <g>

The car responded to "BMW" when new, which I changed to "Alexa" since that's what we use in our home and that name has become a habit. "Alexa" worked in the car for about 3 years, but the last time I drove the Z4 she will not respond to "Alexa" or "BMW". If I push the talk button after trying the BMW voice part in vain, I am switched over to Android Auto. While that does work, I'd rather stick with OEM BMW voice recognition unless I specifically want AA.

Any ideas? My car is about 6 months out of warranty.

Doug