I have had the same issue on my Mi3 W on the latest update.
I have already put my number in once but everytime I restart the phone it requests my number again
In short, my GPS is now terrible.
It is one of the main things I use on my phone for satnav which makes it a real problem.
It does work eventually but takes way too long and if I am in a rush or need it in an emergency than it is not acceptable.