Ignite Weapon failed: Target not in line of sight

Title: Ignite weapon failed: Target not in line of sight

Reproduction Rate:Frequent

Blocker?No

Details: Quite frustrating that the weapon I am igniting is somehow out of my line of sight. Surely I wouldn't have to have enough range on a mob to see it in order to ignite my own weapon, no? And yet that is apparently how the mechanic of ignite weapon works. The spell will fail repeatedly unless my character can see the spider under his feet or behind him. It is a rather weaksauce attack anyway, I suppose, but where buffs costing relatively huge quantities of xp to advance increment in the thousandths, a weak weapon buff is still a buff.

Steps to Reproduce:When a small critter/mob like a small brown spider or caiman has been aggro'd and is underfoot attempt to cast ignite weapon for melee. Often the spell will fail because the mob's point of location isn't in front of the avatar.

User Specs: i-7-6700k@4GHz, 16384 RAM 3438MB used, 15316MB available, GTX970 driver version 21.21.13.7270 Realtek v 6.00.0001.7541 (English)