Unknownreported this bug
some mobs are flyingyoutube : https://youtu.be/NisBeXW_WeI
after update 5.2.0 to 5.2.5 snapshot, this problem was occured. I had never experienced this before the update. i think it's related about after build 4400 patch. (Fixed yRadius, other issues with sphere shape in block targeters) itself.