Re: Aim down sight (ADS) - bug

This is related to the "Cant ADS after getting out of vehicle" bug. 

The biggest offender to this bug appears to be GLs (Underbarrel Grenade Launchers)

If you're using the SFAR-M or something with an underbarrel try a different gun, or unequippment the Grenade Launcher(s) from the Plus loadout for the weapon.