If a Drowned throws a trident into a bubble column, it will bounce forever and never despawn

Title says it all. I was in the process of creating a Drowned farm when I noticed that one of the Drowned had thrown a trident at me, which landed in the bubble columns that I was using to transport the Drowned. I thought it was kind of funny, that it was bouncing there, but it never despawned. Just kept on bouncing forever.

 

https://gfycat.com/HiddenBogusCrab