Not what I would call a bug... but this is regarding the treasure map fragments.
In the attached figure, you can see six columns of map fragments. From left to right, they are the humanoid bottom pieces, humanoid middle pieces, humanoid top pieces, MM store bottom pieces, MM store middle pieces, and MM store top pieces. I didn't have any spare MM Warehouse Manager Materials in Demand quest pieces.
Anyways, it would be nice to have the top set have a different color than the bottom set. Maybe make the top set green instead of orange. In addition, the MM Warehouse Manager Materials in Demand quest pieces and MM store pieces look very similar if they are of the same set (top, middle, or bottom). If there was a way to change the color of the background for either the quest pieces or store pieces, it would be nice.
Other suggestions for the treasure map quest can be found
here, but the above mentioned suggestions are what I consider to be changes that would make things a lot easier for everyone to understand this quest.