Does anybody have a solution for this.
This is the link to the items not floating up.
Are you able to press f3 +g to show chunk boundaries?
if the items are on a boundary that might mess it up somehow.
also i know in the past glass and water did not mix well. water next to glass caused mobs to be pulled down. so maybe the items next to the glass are pulled down and the water pulls them up so they are stuck.
so try changing the walls in a small section to something not transparent.