Guild Wars 2

TLDR:
Start refining a lot of one particular material.
Your new refined materials pop up above the mini map, one at a time.
Look at your inventory, you will see one new material added to your inventory per pop up.
Press the escape key on crafting window. Pop ups will continue above mini map.
You will still receive one new refined item in your inventory per pop up.
*Now, change maps while the pop ups are still appearing*
Open your inventory.
Player does not receive any of the materials that were still in the pop up queue above the mini map.

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I tested this out with silk. If you start refining a large number of materials and then close out the crafting window. Mats will still appear above your mini map.
If you look into your inventory, you’ll see the number of refine materials increasing. If you change maps, the number will stop increasing and you won’t receive the rest of the mats that appeared above your mini map.

I just lost refined leather and silk, due to me changing maps; instead waiting for the items to disappear from above the mini map. I have no idea if this is a new bug or if it has been like this for years.

the pop up queue above the mini map are items already added to your inventory. you do not receive items in the queue as they drop off the end, they are already added, regardless of if you leave map, leave game or whatever. anything in that list is already in your inventory.

edit: also if you exit out of the crafting UI (without cancelling the craft process), crafting still continues until you move away from the crafting station (or you run out of mats). so, if you esc out of the UI and waypoint away, or exit the map, the craft is cancelled. up until the exit, you’re still technically crafting, which is why you see your crafted things still increasing. it has nothing to do with the list above the mini map.

That is not really a queue. It is more like a visual log that scrolls very slowly. Very noticeable if you ever open a large quantity of bags like Trick or Treat bags while doing the labyrinth.

Thank you everyone