since some snapshots ago I have trouble with a rather serious bug:
Items only float in water that was created by world generation. When I dig a hole and fill it with water myself,
or when I build some kind of tank above ground, items don't float in the water, they just sink/fall to the bottom and stay there.
I've attached images showing items floating on a naturally generated lake and sitting on the bottom of a hole I dug and filled with water (water source blocks on all layers, the issue shouldn't be caused by down-flowing water). All pictures were taken on the same map, in the same game session.
Hope this is something you guys can reproduce and fix, although it would be really weird to me if I was the only one who encountered this problem.
Have a nice day!