As France, in the latest beta, I am at war with Prussia, in the Summer of 1806. Saxony is allied to Prussia and at war with me.
After I take the last Saxon city, Dresden, I get an event on the next turn. Saxony joins the French Alliance. However, Saxony does not show as an ally in the Diplomacy screen. All my garrisons are ejected from the Saxon cities, and Saxony has a passage right from France, but does not show as a member of the French alliance. Saxony is no longer at war with France, but is at war with Bavaria. On top of that, France does not have a foreign access right to go through Saxon territory, or even pass through Saxon territory.
And I get a casus belli against Saxony because they are at war with Bavaria, who is also my ally.
Something seems wrong here.
As always, any help will be appreciated.