The 3D FOV enhancement option should only be used as a last resort if there is no other way to raise a game‘s FOV. As the message suggests that appears when you enable it, it can often cause visual glitches, especially in newer games.
For a custom profile the best way to deal with FOV would be to adjust the game FOV directly if possible (e.g. with an ini tweak), otherwise the Image Zoom option in the vorpX menu is a viable workaround.
If you haven‘t done so already, checking the Essential Hints Guide in the vorpX help might be useful, among other things it contains more detailed information regarding the various available options to deal with FOV.