I know other people have mentioned it in their posts, but I wanted to write a specific bug report for it - most of the time in 0.915 the health bar doesn't update when there is damage or healing to a unit. Quite often it only updates when a unit is killed. This health bar issue did not seem to happen in the previous patch.
Also possibly related - when you tame a beast, it normally doesn't update to a green health bar until a great number of unit actions later, or possibly when it gets healed a certain amount (or to full, I'm not sure - but I have seen it update to green once during a battle).