Guild Wars 2

If you spectate someone in PvP, it seems your FOV returns to the old default setting. After exiting the match, your FOV stays at the old default, and when you move the settings slider your FOV goes wild for a bit before settling back onto the new setting.

The FoV setting also resets when the client restarts. It retains the slider position (which isn’t the default FoV), but you have to manually readjust it to return to your previously set value.