Repeated elements should tolerate null values

[spiritual_mosquito]

If a Repeat element does not get a value. It shouldn’t exist. Right now it still tries it and errors out.

[spiritual_mosquito]

Our current workaround is to just give it an empty array instead. This isn’t really intuitive for the designers, but gets the job done for now.

[chungwu]

hmm odd, we should’ve caught the error and fallen back to [] automatically… @icaro