Thanks for sharing those details!
I added Resolving common issues with location access for LifeMap Live to the #wiki
I’d like to keep that wiki post updated with potential fixes, as we all learn more 
I’m wondering if that ‘completely exit’ step is particularly important - even for the folks having trouble in Safari. I’ve update that wiki post to include that in the process, but I’ll need people to try it out to confirm/deny its helpfulness.