Happening here as well. My solution has been to trigger the voice activation, say "hello", siri responds, and then I get my volume control back. I am a heavy Waze user.
Just picked mine up last night. 2020 XLT 4X4 with black package. I live in the Dawsonville area.
OP - my friend Jason may have reached out to you last night asking questions :). I subscribed to your channel as well and look forward to seeing more Mustang and Ranger videos. I have a 2014...