Caustic Arrow and Toxic Rain Not Stacking Damage Properly

The "Wasting" node and the associated chaos damage over time multiplier nodes have always increased the damage numbers for these two skills in the past but this league I picked them and the damage is not increasing.

Was this nerfed in the patch notes or is this a bug?

If you're looking at the DPS number at the top of the tooltip, that wouldn't be affected because that only covers hit DPS.