Xbox Music has been not showing my Album / Artist Lockscreen since it was released. But now Running on my 1020 with Cyan and PD Update 1, its now working. God how i missed the Lockscreen Now Playing. Just download the MPAtool, and redownload your Album Art / Artist. It said it is not compatible with 8.1 but try it it now work fine again with 8.1 PFD Update 1.. Enjoy