After certain animation it will have this white aura coming out from the character, this also happen during climbing up and down ladder
The weapon equipped on this picture does it have an elemental infusion?
It can even be a cancelled charge attack behind this white aura. I can’t seem to get it anymore 
Does it disappear while you are climbing?
Weapon is lightning infused. it also happen when climbing animation end.
This bug only goes away after restart the game.
Have you tried to change weapon or another weapon type to see if the problem still appears. I’m not asking you to change play style I’m only asking to pin point the problem. 
So far i’m unable replicate the bug 
. I think it happen when i panic smashing the buttons
I’ll try it on other waepons when this bug happen again.
I think this only happen when using Gauntlet. In this case I’m using this.
The white aura visual effect can be seen when push left stick direction and pressing attack right after evade.
Is possible the bug triggered when performing this action and got hit at the same time (It also happen when parry, the result is not consistent) .
This bug will disappear after switching weapon.