Husks won't give hunger effect

Cannot reproduce.

The duration of the hunger now depends on local difficulty, see https://minecraft.gamepedia.com/1.10-pre1#Mobs

Oh,ok thanks.Now I noticed that the world was in easy mode.

But still shouldn't they give in easy mode?

They should, can you please press F3 and then post it here? Or check your local difficulty. It should always have at least 7 secs of Hunger. If not, your local difficulty is probably 0.something or just 0.

It seems to show the hunger effect in the screenshot, so this is probably WAI, also on easy difficulty the chance of hunger is 30% not 0%