Is there a known movement bug?

[MadFrancis]

I am playing a single player game (CBM 1.4, LA Man) and have just experienced an issue ordering troops to attack an enemy province. I had a larger force (250ish Defenders and Longbowmen led by Indie Commanders and Castellans, accompanied by about 20 magisters and 8 Magisters of Theology). I am also using Judges to Patrol in the starting province and have two blood hunters blood hunting.

After issuing orders and processing the turn I would see that my attacking forces orders had all been changed to Patrol. This happened three turns in a row, until I moved the troops and priests in without the Magisters, at which point the movement worked fine.

I am playing on a 600+ province map with 50 or so nations.

Is there some sort of map-wide combat cap or similarly a cap to the number of units that can be given move orders? Or was that some sort of bug?