with autogun classes, the charge attack can sometimes pull an enemy toward you. this has gotten a friend of mine killed quite a few times.
with the divine avenger, if you have your back to a wall or edge of the map and you use the charge attack, you can lose the blades of the charge.
with the divine avenger, if you're hit by a lumber's stun as you're releasing your charge attack, it will cast twice.
i don't know what exactly is doing it, but i've seen a few instances where friend's wise owlite (4*) shield will break in a single hit (literally from full to gone). seems to happen very rarely, but i have seen it happen. i've only seen in happen in tier 2 depths.
"with autogun classes, the charge attack can sometimes pull an enemy toward you. this has gotten a friend of mine killed quite a few times."
Some forms of knockback were changed some time ago, to pull enemies to the left. This may be what your friend was experiencing, but I don't know if it is still purposely like this.
"with the divine avenger, if you have your back to a wall or edge of the map and you use the charge attack, you can lose the blades of the charge."
I believe this is because the sword blade 'generates' a little behind the knight, thus the blade dissipating when next to a border.