Just like open captions have been buggy, so have closed captions in the past release of CC. I shouldn't have to re-import a .mxf into my timeline to see why only two of three captions that I embedded and exported are showing up and only one is actually playing back.

To add, it would be wonderful if something other than a .mxf could be used as something we could embed 708 captions to (i.e. .mpeg2, .h264 - something).