Hi,
I just logged in and my 2 equipped rings, chest and 2 bags slot completely disappeared from my account. Nothing has been sold or disenchanted, it doesn’t appear in my items restoration and sold items. It’s just gone. I disabled all add-ons. Nothing else is missing, all my gold is still there.
Exit the game and launcher for about an hour. This is most likely a display bug and doing so could resolve the issue. You could also try a full UI reset, and that might help faster. To do a full UI reset, while completely exited from the game and launcher, open your WoW directory. Delete the Cache folder. Rename or delete the WTF and Interface folders. Restart the game without installing any addons. See if the issue persists. If it does, you can exit again and delete the new WTF and Interface folders and rename the old ones back to the correct names. That way, you wont have lost any addons or settings for them.