I like to keep my FOV Slider all the way turned up.
Not a huge deal, but custom FOVs break after the radio tower liberation sequence.
Here's the bug:
After liberating a radio tower, when the game returns to the regular FPS view, the FOV is always severely decreased. When I go into options and check the slider, the slider is turned all the way up still, but in game I have less than 90 degress view. the first person view looks like it is zoomed in.
I can usually fix the issue by turning the FOV slider all the way down, exiting the menu, then re-entering the menu and turning the slider up again, or restarting the game, but it is a huge pain in the ***.
When I can't fix the problem by adjusting the slider, Turning the slider up just makes the FPS View zoom In. Sliding the FOv slider down makes the FPS view zoom out. So basically the FOV slider becomes a zoom slider instead of FOV after this bug occurs.
Edit:
Here's my specs
Intel i7
GTX Titan
32 GB RAm
Windows 8.1