Yes I can confirm that the gates seem to be having issues "finding a gate" and only opens and closes a 3x3 area. I am not in-game currently so I cannot provide screenshots, however it was a wall of fences that were 3 tall, and about ten wide, with the gate sign placed on the side. We tested the sign being on both a fence block and a plank. Both ended up with only a 3x3 area opening, and the message "Failed to find a gate". When the sign was placed on the wall of fences it self, the gate sign broke itself when it opened a 3x3 area in the wall.

Also, moved:

General Discussion --> Help & Support.

 

I am having the same problem with a 4x4 gate. Here's a screenshot of what happened:

 

Me too, I was getting this but my gate still worked. It sayed " Failed to find a gate " but the gate still worked.