Reproducing all issues: enter editor and spawn a BLUFOR AT Rifleman, an empty helicopter and unarmed OPFOR vehicle close to each other.
Issue 1: click RMB and hold RMB as infantry then enter the helicopter and do it. Note: you will have to switch to missiles! Now you will notice that holding RMB zooms as infantry while it does not while in the helicopter which is a clear inconsistency.
Issue 2: equip your launcher and point it directly at the enemy vehicle. Click RMB and notice that you will toggle optics and lock on at the same time. This is obviously never practical and should be considered a bug.
Issue 3: remove “Lock and zoom” binding and instead bind “Zoom in” to Hold RMB. Right click to use optics and then hold. Release. You will not zoom out. This is a bug.