Hi guys,
Old topic, but for what it's worth: this "hollow architectural tick" appears when your drawing is not entirely flat. Even though you guys use LT, the elevation of points can appear. And then your dimensions will change from "filled" to "hollow".
Make sure your drawing is flat (many ways: flatten (the worse, because rename you blocks); move to 0,0,1e99 and 0,0,-1e99; change properties elevation to 0). Purge the drawings and then do again some dimensions. That should work properly.
Have fun