I've set an override on a weapon to none and seemingly at random the weapon override stops being applied. This commonly happens when loading up a world however it also happens quite commonly when just swapping weapons.

The band-aid fix I've found to this is to simply go into the config > WeaponOut Lite > Item Manual Override. This fix is only temporary though.

It should also be noted that I am running Calamity Overhaul however I have their weapon display setting turned off.