I have a 2017 Macbook Pro 15 inch running 10.13.5 and a bootcamp partition of Windows 10. I cannot boot into windows unless I select the windows partition from system preferences and restart from there.
If I try and hold down the option key on restart, Startup Manager opens but no matter which partition I click, it boots into macOS. It will not let me boot into windows this way.
Is there any way to fix Startup Manager/boot into windows?