Why is my GPS always on?

Hey all,

Wednesday last week (5 days ago), I noticed the little GPS arrow in the status bar appeared and has not yet disappeared. It is draining my battery like crazy! (around 3 hours medium usage and around 5 hours if I just let the phone sit there and do nothing).

I have tried the following:

- Ensured every app in Location Services was still "Only While Using"... Didn't work

- Turned every app in Location Services to "Never"... Didn't work

- Turned off every system services in Location Services... Didn't work

- Turned off Location Services entirely... Didn't work

- Turned off Mobile Roaming... Didn't work

- I even put my phone into Flight Mode, and the little GPS arrow still persisted and still drained my battery however in about 8 hours instead of 3-5.

I have also reset it a bunch of times (obviously).

iPhone 7Plus, running iOS11.2.6

TIA