Thanks for participating and clarifying even though it's frustrating for you. And, I didn't know that [unnamed brand] was having issues. We have two of those cars and no issue. But, you're right; that's anecdotal and doesn't prove anything. Links to [unnamed brand's] problems are helpful and good information.
The only reason this particular participant (me) continues with this issue is because some of the information posted on these threads can be misleading (inadvertent, for sure). When people helped with information about the contract issue, we saw several posts about the fob manufacturer, even including their name and photos of the fob. That was, in my opinion, unfortunate and a blind alley. If it's a Bluetooth only issue regardless of the source (phone, fob) then that's really good information.
With that knowledge, we can stop turning off Wi-Fi, we can get rid of the faraday cages and stop going to rear doors first and all the other non-working work-arounds.