Deadeye Mark's buggy line of sight toward certain objects

[Cougre.6543]

It's nearly impossible to hit both the octovines in AB and the catapults in the Junundu Rising event with Deadeye's Mark. Instead the skill will go on cooldown as if interrupted and the red text claiming that there was no line of sight pops up, despite there very much being a line of sight, as can be proven by the same class' rifle skills hitting from the same position.

Now I assume that there are more instances of this bug that I cannot name. So far the pattern seems to be entities with the crosshair target rather than enemies with AI. And while Deadeye is the class most affected by this, it's worth mentioning that many other targeted skills like Guardian's Ray of Judgment and one of Mirage's axe skills also fail to even be casted here.