Ocean structures misgenerate and affect world generation

I don't know if the old age of this world affects the generation, but when generating new terrain in the ocean, the structures are generated alone and not together (for example the oceanic ruins are generated from 2 or 3 structures), for some reason they do that the terrain forms "circles" around them; ships, ruins, portal ruins. I have also seen that some structures such as the portal ruins or the oceanic ruins are generated twice, next to each other, sometimes they overwrite each other, but I don't know if this is due to the same generation error or if I have to Attach it to another ticket, since when I see the circles and some structure in the center of it, I see that some structures are "duplicated", so to speak.

Also, I've seen grass spawn in the center of those circles, the game tries to remove the water. Maybe I have to make another ticket for this or maybe it is valid for this error because it is in the center of the circle (and/or is also the cause of the generation of the circle, like the structures)

Attached the link of a video for more details. https://drive.google.com/file/d/18p3JQkpEPzjv2pY0ESiHXoxyLdjvLC1h/view?usp=sharing

World created in 0.9.0. But those chunks are brand new.