Switched to satellite view to check some terrain while building a long route, and all the lines just disappeared: Lifemap, route in progress, nodes, everything. Gotta start over too 
Additionally, the lifemap lines wouldn’t reappear upon reloading or clearing cache and refreshing…but what worked was logging out and back in (I could still see them on my logged-in phone so I knew it was a local thing).
It sounds like the code that collects & re-adds the data after switching the layer worked in an unexpected order. 
The fact that your LifeMap wouldn’t return is very odd, and the fact that it required a log out/in is even weirder.
I’ll see if I can enforce some order in there 
Yep, never happened to me before! Hopefully a one-off thing but figured I’d report it anyways in case it can help improve.