that is due to OnePlus scout!! since it is there in launcher and enabledz hence whenever you open screen it checks location
So what to do to remove it
disable the location permission to scout, in scout settings or OnePlus launcher settings
I am facing this same issue in my OnePlus 7t pro , and I don't find any setting as scout in the launcher. But after restarting the devies it goes off but once I use the location manually even after turning the location off the symbol from top of my screen doesn't goes off 😑
Same issue with my OnePlus 7t
Announcing the OnePlus 8T Launch Event – You’re invited!
by Pete, 2020-09-21