blocked words are not shown to user

I recently submitted a very safe prompt "A Tardigrade as large as Godzilla, smashing buildings in a city"

I got this response: "Uh oh. One or more words may not meet User Guidelines and were removed."

It did not say what words were removed so I removed the phrase that included "smashed" thinking maybe Firefly was being puritan. I got the same response. 

Firefly needs to tell the user what was blocked so we know how to reformat our prompts!