I was attemping to put some lifters in my station and..this happened. The grey thing that appears is solid and you cannot move through it.
Here are image links.
http://prntscr.com/2db3xk
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Here are image links.
http://prntscr.com/2db3xk
http://prntscr.com/2db43e
http://prntscr.com/2db460