Some commentary:

https://www.wowisclassic.com/en/news...c-ptr-phase-5/

Blue Tracker:

https://classic.wowhead.com/bluetrac...3585&region=us

Original source:

https://us.forums.blizzard.com/en/wow/t/ptr-patch-notes-wow-classic-version-1135/553585/1


WoW Classic Hotfixes to date (updated June 16):

https://classic.wowhead.com/bluetrac...1448&region=us