Regression: Domri, Chaos Bringer - riot doesn't trigger

[fearphage]

Steps to Reproduce

1. Uptick Domri, Chaos Bringer
2. Use the mana to cast a creature spell.

Expected Result

Riot should trigger and present the option of giving the creature a +1/+1 counter or haste.

Actual Result

There is no trigger. Nothing takes place.

Notes

Confirmed that riot works on creatures that have riot built in (nothing to do with Domri). Rhythm of the Wild also worked. It seems specific to Domri instead of the riot mechanic.

Here's a screenshot showing 2 of 3 riot triggers in action:

[JayDi85]

@jeffwadsworth What's your IDE?