I also deployed a change to production about an hour ago that should prevent crashing or visible errors. The downside to my change is that invalid backgroundColors will just be ignored. The upside is that I think they were being ignored in the mobile apps before this bug appeared. So we’re back to ignoring you 
It’s good to fix your DTHs anyway, but unfortunate that you were forced to do it. Please let me know if you are sill experiencing any issues and I’ll do my best to track it down.
Thank you to everyone that helped to track this one down, and helped others fix their DTHs.