Map MFD: wrong direction to base

Sometimes the calculation of direction to base is wrong in Map MFD.

Steps to reproduce:

Take, for example, "DG-S ready for takeoff" a default scenario in oribter 100606.
Set target to 'Gran Canaria' in Map MFD.
Map MFD shows 106.3 degrees as direction to base (Brg), but the right direction is 73.7 degrees.

I used the formulas:

cotan(r) = (tan(lf)/sen(ΔL)-tan(li)/tan(ΔL)) * cos( li ) = 0.293
Rc = atan( 1 / abs( cotan(r) ) ) = 73.7 degrees

where

Rc -> direction to base
li -> Cape Canaveral latitude
lf -> Gran Canaria latitude
ΔL -> Gran Canaria longitude minus Cape Canaveral longitude

Rc should be less than 90 degrees, because cotan(r)>0