I have two systems running on the Insider Preview here, but one of them is behaving oddly. Simply put, it hasn't received a new Fast ring update since Build 14383. Windows Update itself is working - I just received updates for Office via Windows Update. It's been on the Fast ring since the start, and I'm still getting app updates (i.e., the Store itself updated to the same version in 14388). What's going on here? Any suggestions?