Originally Posted by S0bes
Because xposed created not for just one phone. It was created basically for all phones which running stock (or close to stock) android. Xposed replaces some methods or I don't know what exactly when phone is booting. And if there is some modification (CM is modified a lot) then it can conflicts with xposed. That's why xposed or some modules can crash. CM is based on stock android but there is a lot of modifications in code.
i just get really weird things happening like one of the nav buttons will disappear completely and the home button won't do anything (even though it shows it's been clicked).
it's weird, i never get any issue like that on slim etc, but all cm based ones literally make my phone go bonkers
edit: even after uninstalling xposed on c-rom it's completely cocked! lame....