Atziri's Contempt and mirage archer

not sure if this is a bug
when using mirage archer (i was using twister)
mirage archer also applies bloodstone, which can be consumed.
But the ones from mirage don't show as debuff on enemy, but can be consumed as well as ones which come from you.
I tested it by summoning mirage and not doing damage myself, and was able to consume bloodstones with Shattering Spite multiple times.