FuzzyBot imports already fuzzied.
Thanks for the report. I'll file task and see if I can mitigate this.
I have run script that fixes this for existing imports. https://phabricator.wikimedia.org/T237412 tracks how to prevent future cases of this. https://translatewiki.net/w/i.php?title=Special:Translate&group=wikipedia-library&language=pt&filter=fuzzy&action=translate contains a lot of fuzzy messages now.
Message group stats was not updated by the script, but they will hopefully "repair" itself over time.