Honey Flooding Extraction

I’m wondering if a vinyl hive mat over the brood would stop the honey getting on the brood?
I completely buried some bees in a whole lot of wax and honey in a trad. extraction session this year and was surprised the next day (after further processing that mush) to see the then freed bees clean themselves off and fly away. I thought (before reading this topic) that any honey dripping on them during harvest wouldn’t kill adult bees.