The bug
Arrow, trident, egg, snowball, ender pearl, splash potion, lingering potion, fireball and shulker bullet stuck in the upward bubble columns does not disappear or become an item state.
Example
Here is an example in video:
[media][media][media]
Linked issues
relates to
Attachments
Comments

Confirmed for 1.14 Pre-Release 1 and 1.14 Pre-Release 2
[media]
Still in 1.14 pre-3, 1.14 pre-4 and 1.14 pre-5

Still in 1.14 Release

Still in 1.14.1 Release

Still in 1.14.2 Pre-Release 1 and 1.14.2 Pre-Release 2

Confirmed in 1.14.4.

This bug still confirmed to exist in 1.14.4 and is quite annoying now as the bug(bugged arrows) are causing an insane amount of huge bubble particles to spawn and they do not despawn..
I managed to stop the particle spawn by removing the water source block and replace it, but the arrows are still bugged and stuck in the air.

I found a solution that works for me. I simply edited the despawn counter to increment no matter the conditions of the arrow. The only trade-off is now flight time counts against the despawn timer. But having them despawn a couple of seconds early is a much better option than a player using arrows to crash my server.
https://github.com/pl3xgaming/Purpur/commit/bdab56d256db992e6170634a53c742b369d4814b

Tridents thrown by players should not disappear, because they are very rare item.
@@unknown, description and summary changed.
I know this is a bug that can cause performance issues, but I really hope fixing this bug doesn't break ender pearl honey block teleporters; if it does, I hope that it's not intentional. If patching honey block teleporters is intentional, I would love to see a new item that teleports players over very long distances easily.
Can confirm in 21w05b.
Can confirm in 21w07a.
Video attached.
Can confirm in 21w13a.
This issue relates to MC-83107.