Won't fix: Unnecessary crusades

[Brownbeard]

unnecessary crusades

after you finish the crusades(no heathen rulers left) the crusades soon end

each time you load the game afterwards, the crusades start again and end in a few months.

*this has no effect on gameplay, because, due to lack of heathens you lose 0 piety.

 

[Grosshaus]

Sorry, seems like it's a problem that occurs only in extreme cases, isn't a major one and would be hard to fix.