Emoji within step description breaks wizard

Hello! Stumbled across this issue after our most recent update:

We had a :grin: emoji in the description of step 5 of our wizard. Users would reach step 4, but wouldn’t be able to progress to step 5. An error shows in the console of the browser (I don’t have it, sorry), but no indication of an issue is shown in the UI.

Removing the emoji from the description fixed the issue, and allowed the user to submit their wizard.

We’re running wizard plugin v2.2.2 and discourse v3.1.0.beta2 52d4de7b45