(https://i.imgur.com/kVoirz0.gif)
On a 45 degree slope, a normal lemming can jump into a zombie blocker and will get turned around without being infected.
Not sure if this is indeed a bug(probably the jumper enter the trigger area of the blocker but doesn't hit the blocker itself so he get turned around without being infected) but it's very counter intuitive imo.
The jumper assingment is pixel-precise though. There is only one frame you can assign jumper.
Ah, I guess that's the "3-seconds rule" in action. :D You know, the one that applies to dropping food on the floor, and how long it takes bacteria to jump on it, so that if you pick it up before, you could still eat it?
That Jumper touches the Zombie way too briefly to get infected... :evil: Then again, so does a regular Walker, who does get infected as expected...
Here is a sample level showing this.
included the replay
Definitely a bug. I'll try and get this fixed for 12.12 - as it's a physics bug it will not be backported to a 12.11 update.
Fixed in commit 5266fa8.