I've found what I believe are two bugs with regards to showing inventory item names.
1) When using a button to shift inventory items in a grid, the item name pops up at the old item location when moused over. Here's a gif to show it in action. In this case, I've shifted just one spot to the right.
2) When mousing over nearby inventory items(but separated by a small gap), the hotspot name of the most recently moused-over item appears at the previously moused-over item's location. This happens for just a split second, but it's quite noticeable in-game, especially when mousing over multiple items. You can see this especially at the end of this gif:
Here's a screengrab from my inventory menu (not sure if you need more info):
Comments
I've found a workaround by having an additional mini-update after all menus are updated (hopefully with minimal performance impact), but this is likely separate to your "all hotspots" report - though the effect itself is the same. Could you provide a similar demonstration of this new issue?