Cross staff and center beam problem

As you can see in the attachments, when using cross staff and centered beam, the 32nd beam should be above, not below the 16th beam. How can I change this?
Correct.png
Incorrect.png

looks like a genuine bug to me… (hope I’m wrong…)

Also, I had to use “Force Center Beam” because the Center Beam box in the lower panel is not accessible (grayed out) for some reason.