Blizzard has shared some Development Notes for Patch 1.14.4, which mentions that the PTR will be offline from July 13 to July 20, 2023. Additionally, when the WoW Classic PTR returns, there will be testing for the new Classic Era PvP Honor System.
July 6, 2023
Build 50337Testing Focus
We will bring the Hardcore PTR realm down on Thursday, July 13. It will then be unavailable for approximately 7 days until July 20.