Sheep can't exit in an open door

When i trying to get out all sheep in my house I noticed that they can't go outside in an open door, I hold a wheat to make them follow me.

What I expect to happen:

Sheep can exit because the door is open.

 

What actually happen:

Sheep can't exit in the door even though it's open.

 

My Device:

Cherry Mobile Flare S4 Max

Mali 400-mp

1 GB RAM