Rumors swirled that Rob Kardashian and Blac Chyna might have called off their engagement after he wiped his Instagram account clean. While the sudden deletion raised eyebrows, it turned out that he and Chyna were just dealing with the aftermath of a fight. And on Wednesday, Rob and Chyna finally appeared as a couple on social media again, when Chyna Snapchatted videos of Rob using the app's signature filters.