Some of the suggestions on Twitter range from totally crazy to totally possible and we'll leave it up to you to decide which ones fit into which category. Like, for example, the one that he dumped her because she didn't wish him Happy Birthday on social media.
TMZ, but wouldn't elaborate on what that something was. And the other leading theory (also reported by TMZ) is that their schedules simply conflicted too much, which actually makes total sense when you think about it.
Tyga is busy with his music career, doing performances, in the studio a lot, the whole nine - and Kylie is busy doin' her thing, flying to Australia to promote her new clothing line with Kendall, doing appearances, working on her business, filming for the show, and all that goes along with it.
They both basically have insanely busy careers that demand that they be in all different places all the time. When they wanted to do an event together, one of them had to cancel their plans and that would be tough always having to make that decision of whose event was 'more important.'