All map nodes for the collectible Khaz Algar profession treasures are showing again on the map for characters that have previously collected the items.

Things I checked:

• Individually hiding each node removes it from the map until restarting the game, upon which it reappears again.
• Turning the entire group of nodes off then on again does not resolve the issue.
• Learning a Khaz Algari profession on a character that had not yet collected any treasures then picking one up and using it did not correctly remove the node from the map.
• Learning a new profession for a character that already had one then going back to that profession also does not hide the previously collected treasure's node.
• Only seems to apply to Khaz Algari profession treasures, does not seem to appear to apply to Dragonflight profession treasures, they remain correctly hidden for characters that have collected and showing for those that have not.

I don't see that having happened on my characters, so there's presumably something more-specific happening. Firstly, could you double-check that you don't have "show found" turned on?

So I don't have quite the same settings view however I went searching and checked then unchecked the "Show Completed" option under the Visibility heading on the General settings page (after clicking "Open Settings Panel..." which seems to have resolved the issue. Not sure I've ever fiddled with that setting before, or what triggered it to suddenly wig out, but thanks for the fix suggestion!