Grand Taste of Venom has the wrong value for the poison. Instead of the range 65% to 100% chance to poison on hit it has the range 65% to 10% chance to poison on hit.
Up! I just encountered this!
Bumping this because it wasn’t mentioned in the last two patches, and I still see the bad roll on my character currently after updating today. Poison is built around being self-scaling so this is really crummy.