High level loyalty trident will not go to inventory even if there is free inventory space

Get a trident with loyalty level 100, throw it, then fill your inventory so it can't go in your inventory. It will hover around you for a while. Wait until it goes over your head and stays there. Then, even if you clear your inventory or have a free space it won't go into your inventory. 

Example video: https://www.youtube.com/watch?v=3f--xsGnFto