I am also having this issue with the North armor, for the record.
Still, a fun, simple (in a good way) mission with lots to do. A great introduction to more complex situations for new pilots ready to progress past "go there, kill that". The coord entry is a nice "push" into CDU data entry, and the lack of JTAC is a good opportunity to exercise the ol' Mark 1. Also, the friendly vehicles/armor add some immersion when everyone starts shooting.
I had a great laugh after destroying the North bridge - I have civi traffic on "high" and the ensuing traffic jam was backed up into the city!