After the patch I found myself quickly needing a few pale essence orbs and I was near Dalimond so I visited the small patch behind the spiritist trainer's location south-west of Dalimond.
I was surprised to find that I couldn't gather essence from the weakened pale wisps or a lone enraged pale wisp located there. Even after killing the enraged wisp I was not able to gather from its corpse. The pale essence residue in the vicinity was my only viable source of pale essence.