Items twitching on the ground for too long
Items just do not show its names before they become calm.
After updates (I can say especially after Atlantis major update), the time that items taking to calm down after landing is quite considerable, speeding up the game speed in options doesn't help - item's vibrations becomes more frequent, but it does not affect time of that phenomenon. Maybe its possible to make a restriction for how long an item will find its way to calmness or set up a time limitation after which an item will show its name and become lootable even if its still pulsating.
Players discussing it already that on the way back from long caves they can find missed items, few pointed out that they found better gear and would've miss it without sudden way back.
I noticed that for me this issue happens mostly for thrown weapons, followed by staves and spears but sometimes even rings or gold take a long time to come to rest. It happens in all regions of the game. Easiest way to reproduce it is probably to open loot containers. Mobs just don't drop as much.