Vow of Chivalry Bugged

Hey guys, getting back into the game and wanted to try a Brettonia campaign as I haven't ever really played them much, and they got a relatively recent overhaul. So I picked the vow on Louen that says Rank up 5 times, but still hasn't shown any sign of change. He is 12 now, I started this around 4 or 5 I'm sure. Has anyone else ran into this before? Any potential fixes? Seems this helps to balance out the knight upkeep and missing it can totally change how the game plays out.