The new standard way is supposed to be used by all vendors, instead of a slightly different proprietary method separately maintained by each. So you'll have the

The new standard way is supposed to be used by all vendors, instead of a slightly different proprietary method separately maintained by each. So you'll have the usual "design by committee, with all committee members being direct rivals" bloat. And it seems that this is one of the first actual hardware implementations of said method; the OS-side software implementation has so far only been tested against emulators. It's not that surprising to see bugs here.