Reposting this for the benefit of the QA team, if they even read these forums.
https://imgur.com/a/yy6mJVk
This screenshot shows the state of wintergrasp keep, off the back of an alliance wintergrasp win. Horde able to use vendor. Both ally and horde in same phase. Ally unable to use and do not have the stonekeeper shard buff. There is no phasing in or around the keep.
As Chiffley has said, we’ve all done multiple world tours in the immediate aftermath of wintergrasp victories, and are potentially hundreds of shards behind players on horde.