I also noticed that turning on and off Significant Location is busted too! When you turn it off or on you have to force close the Settings to actually see the change, otherwise, it will show the last state (before the change). I cant wrap my head around those little things - 10 iOS11 betas are here we are dealing with such crap.
I made a short video showing the problem
https://1drv.ms/f/s!Ag9bCpwgo2HWgstkgIw_pyxxcqxe4g
Just go back one more level, and then back again into System Services, and you will see that Your toggling of on/off for Significant Locations is ended being retained—no need to force quit the app.