W.I.N.bot gets stuck on normal, pathfinding included structures

The winbot in question is almost in the center of the picture, near the gate and flingomatic.

He is stuck and needs me to nudge him, even though it's not a fossil, statue, or anything.

It's not the first time this happened. It happens very often. 

Their AI needs fixing.

Edit: Also, their item grab range is extremely small. It can block itself on trying to pick up the same item infintie amount of times, because a hound or something else is blocking it.

It has the range to begin the grabbing animation, but not enough range to grab the item in question? Inconsistent. Also needs fixing.