There was extensive troubleshooting, involving RW looking at calls on their end from the contacts that did it all the time. They could not find anything amiss on their end routing wise, so i figured that it must be something with the other persons provider (Csipire) though it did it a few times, very rarely with a RW contact.
The “doze” macro does not do anything to address this odd calling issue, on the Pixels, as far as the few folks that did test it said, myself included observed.
For me, the issue is random, sometime it happens alot for a time, then not at all for ages.
It has happened across the OG Pixel, and its 2 OS versions it had, and my Pixel 3 with A9 and 10.
If other user has the issue all the time, then could be different issue/cause.
Won’t hurt for them to give it a try though.