As per https://us.battle.net/support/en/article/000010566
April 2024
We rolled out a fix-up for characters that obtained the wrong item level from their Timewalking dungeon / Raid cache. Affected players have received an in-game mail with the cache replacement.
There are those who still have not received the replacement cache. In game support say if you didnt get it to bad we can’t do anything…
So what can support actually do? What is the point of it if they cannot correct bugs that still remain bugs even after the supposed fix…