Frustrating. I held on to my 2017 iPad Pro with the Lightning port rather than jump to the new USB-C Pro, mainly because of this issue. Well guess what, I just upgraded it to the iOS 13 beta, and it doesn't see the VX at all now. I'm not super mad about it - it is a beta OS after all, there are always risks, and I'm just a hobbyist, not a pro musician or anything - just holding out hope that when the final version hits this fall, my VX will work again!