Country keep joining religious war

[Krozan]

Countries with whom a white peace or a peace offer was concluded keep joining the war over and over again...

And yet, there is a truce of at least 5 years—sometimes even 15.

I already wonder why all the Orthodox nations—all the way to Muscovy and Georgia—participate when they have no rival involved; it gets very tedious.

After joining twice, these countries ought to be suffering from a stability hit of over -50 and shouldn't be able to join anymore; not to mention the money they're spending on mercenaries—they're going to end up bankrupt.