Structures and caves break water plants.

I were walking while i noticed some water plant items above water stone structure.

Can you attach some screenshots?

I dont have screnshot and world/seed. I deleted it.
I can only tell that it is water ruins from stone. I added related picture, but not screenshot.

it was near tower ish structure of cold biome.

Update: hapens with caves.

OK I GOT WHAT THERE HAPENING

The result:
20 of Water starts flowing trigering gravel.
150 entities by faling gravel.
150 entities by seaweed items cause it was on gravel.
= 320 entities forcing players to disconect.

I remember when i had low end computer, and i couldnt even move on 100entities.

The server owner fix:
999 broken plugins that search for entities and (hopefuly) remove them.

The posible fixes
remove gravel from ocean
make gravel/sand triger fall by actual block/player rather than water/lava
make water flow inside rails rather than breaking them.
delete rail gravel sand entities that are above 70 in recently generated chunks
disable gravel/sand block updates for time period after geneting it
don't spawn wolfs near sheep
don't spawn foxes near chicken

Duplicate of MC-134156