(T̶h̶e̶ f̶l̶a̶t̶ s̶i̶d̶e̶ o̶f̶ m̶o̶t̶o̶r̶ b̶e̶l̶t̶ i̶s̶ a̶l̶w̶a̶y̶s̶ f̶a̶c̶i̶n̶g̶ n̶o̶r̶t̶h̶.)
EDIT: vertical motor belt are always facing WEST

As of the latest 0.3.0 build, the bug is still present:

Fixed by fa8dbb6