Yup, happened to me. Noticed this because I was saving a green can for a friend.
May 10 2016
I actually experienced this just now. The invisible zombie could be seen by another player (fresh spawn), while it could NOT be seen by my friend and me.
It was attacking the other player and it also attacked me. I could see the blood hit effects on my player, and it made my character bleed as normal.
We dropped an axe for the player and he killed it. The zombie corpse also could not be seen.