Bloodmage spell leech not applying to chaos dot spells

So even though the ascendancy node for blood mage states spell damage gives 10% leech, spells like essence drain or contagion do not leech the life. This is probably not intended behavior since they are buffed by any spell damage as well as +# to all spell skill gems.

Leeched as life effects hits only. If you hover over it on the ascendancy it says as much.

If it makes you feel any better, it appears its actually bugged for hit based damage.