[Bug] Drath health problems

So this a a pretty remote bug that I stumbled upon, but a bug nevertheless....

Details:

Game Version:  1.06

Mods:  Fishery 1.2 and Abilities, Traits, and History Mod 0.45 (so I`m not 100% its not the mods that are causing it).  Wondering if anyone has experianced this without any mods....

I had a platoon of veteran Drath in an army with a dragon, and my soverign.  They got into a scrap with Trolls I think..... the trolls did one point of damage to my drath.  After the battle I had 11 Drath instead of 12.   Thinking that was strange, I  sent them to a city... soon after wards thier health went all crazy.  One turn they would loose a bunch of health, the next they would heal.  Then loose again.... eventually they lost more than gained and my platoon was reduced to 1 guy.....  the complete process took about 20 turns.

Unfortunatly I only have the save game for after-the-fact.  Don't know if anybody wants it or not..... please let me know.