Can't clean large chicken coop with NH skidsteer.

[Arrancar88]

PC 1.1.1
Small NH skidsteer(the one with wheels) with skidsteer bucket and large chicken coop(Ravenport).
Bucket won't pick up any spilled wheat. Tried it with Manitou telehandler and it works fine.
Singleplayer
Just buy Skidsteer with bucket and try to clean chicken coop.
Mahindra is my only mod.