I thought there might have been some interfering auto killed app, so I unchecked all of them and proceeded to block half each time to find the problem. 0 apps blocked, music worked after screen went off. Half blocked, music still worked. 3/4 blocked, music still works. 7/8 blocked, music still works. Block everything I intended to be blocked the first time around, music still works.
Yeah, I have no freakin idea why my music stopped after playing with the blocking, but it solved itself somehow. Just try soft reset, give it some time.