I hope this isn't already covered if so sorry and post me to the link.
I have had this problem over and over where when my troops die they respawn with low health like a Sovereign.
Also I had this problem when I fought against this one guy with my 8 spear-men group they killed the one guy and at the end of the round my spear-men were dead, and they were never hit in tactical battle.
Noting not sure if it was fixed with the hotfix but I saw multiple Janusk's the one round.