Essences not dropping loot

I have seen multiple mobs that just vanish on death or something and drop no loot. Most obvious it was on essences as they are always supposed to drop. Thought I was going nuts but it appears to happen quite often.

Found a reddit with a recorded proof of this issue.

https://www.reddit.com/r/pathofexile/comments/1bv8dav/essences_now_sometimes_drop_no_essences/

GGG, please fix.