After the last update I have encountered a few bugs with the habsurg faction:
1) Magyar grenadier does not spawn itself but takes population. This happens both with spawn by the church or the artillery foundry
2) magyar hussar turn invisible once it attacks buildings.
Zulu AI is broken and won't do anything (used to be fine before update)
Japan AI is broken. Doesn't gather anything other than wood and if you're using it as ally, you might need to give it resources otherwise, it won't advance of age.