Ah, interesting! It should be supported (at least that's what's intended) but since it's a new interface, it's possible that we forgot to add or updated something related to the review UI. I'll look into this!
Sorry, this was a bug in the very latest nightly build! Also see here: ArgumentError for prodigy train on v1.11.0a6 - #3 by ines Just building new wheels and will release a new nightly with the fix shortly 
Edit: Done and fixed in v1.11.0a7!