[FEEDBACK, NOT A BUG] Incorrect Colored Modifier on Gear

What were you expecting to happen, and what actually happened
From what I have seen so far, all items have modifiers on them that correspond to their color. Blue equipment having iceward, purple equipment having darkward, and similar.

However, I just found this from the 750 gem daily offer:

I would expect that every piece of equipment would get a modifier corresponding to their color, as all drops up to this point have been, as any item that isn’t like this is nearly useless due to it not being able to be used for PvP colored days nor for its obvious synergy. Given that this is purple, would assume it would be darkstrike and not lightstrike.

How often does this happen? When did it begin happening?
When buying the 750 gem random accessory from daily shop.

Steps to make it happen again
1: Buy 750 gem accessory from daily shop.
2: Keep doing that until it gives an incorrectly colored combination.

Already encountered this several times.
But, why gears have to pick ward/strike affixes that fits it’s color?

Most spare equipment is used solely for the purpose of the color restricted PvP mode. If the gear’s modifier doesn’t fit its color restriction, it won’t do anything in those instances. This piece of gear has 3% light damage, something that no purple spell in the game can do.