Description: After researched the tech for gun powder, you unlocked Troops with guns that will replace bows, In my case, I was the ottomans with the special troops with guns, but my archer can only upgrade to the "normal" troops with guns not the special one, "normal" one can't upgrade to the special troops neither.

Attachments: French Turn 169.ctr, WAR 2.ctr

Expected Behavior: Can't upgrade to the best possible troops of bows -> guns, I haven't encounter this before in previous eras