placing a net or solar panal next to windmill destroys windmill

twice now I've had to go and replace a windmill.  once I was placing solar panels next to a windmill and it destroyed the wind mill.  The next just happened a moment ago.  I have a tower on my compound and I have windmills sitting at the top of the towers.  under the tower are square segments where I've been adding netting instead of solid walls.  I just placed a netting under the most top rung under the floor where the windmill is sitting and it destroyed the windmill.  Now I'm out 1000 scrap all together.

Any help would be appreciated.

REDDAWN.  EZ Zombie server