When exporting out to AFX, it can take a fair while depending on the length of animation (my scenario 3250 frames).
If I render out a JSON file using the PNG option, there is usually an ongoing update to where it is in the process. But when rendering out using MOV option, everything appears to get stuck, in my case at 62% (whilst "preparing").

Even though it is not stuck, it does give the impression CTA has crashed. Is there anyway the progress bar can give some sort of regular update/progress message to where it is in the preparation stage, other than a spinning wheel of death?

When finally at image rendering stage, which itself can take time, at least you get a countdown of where you are in the stack and no horrid spinning wheel.