Kanye West has a beef with his BFF Jay Z -- for reasons you might not expect!

The rapper ranted at his Oct. 19 Seattle concert, complaining to fans, "Don’t call me after the robbery and say, ‘How you feelin’?’ You wanna know how I’m feeling? Come by the house … Bring the kids by the house, like we’re brothers." West admitted he'd had a falling out with Hova recently, kicked off by complaints about Jay's Tidal streaming music service and the percentages paid out to artists, but it descended into something more personal: "It went into some Tidal/Apple political s--t about percentage on songs ...I can’t take this s--t, bro! Our kids have never even played together."

We have a feeling this all goes back to Queen Bey not exactly loving Kim. Dang, it hurts when OG besties fall out because of their wives! And wouldn't a playdate between Nori and Blue Ivy just be the cutest?! Jay, get Bey on board with a mommy-and-me sesh with KK and North, stat!