Tridents may fall through blocks when reloading

Each time I log back on to go to one of my farms, the Trident in the Trident killer is either missing, or ends up being moved to a location outside of the  kill chamber.  Sometimes it's just gone, other times it can be 7 blocks down in the ground, or lodged just outside of the kill chamber.  I am on a PS4 and just received the newest update, but this has been happening for about 3 weeks now. I am on a (6) chunk distance setting, but it doesn't seem to matter what chunk distance I set it at.

Any idea?