The natural spawn of fish in oceans or rivers causes a large FPS drop. But if the spawn of mobs is disabled, there will be no FPS drop.

This problem affects any world.

It is extremely difficult to play near oceans because of this problem.

I realized that this problem does not affect all devices, just the moto g5, moto g5s and some others. My Samsung t280 tablet and the Galaxy j3 are not affected.

Moto G5S

2GB RAM