I held a trident. It was there. I opened a void world to check for it to see if it is far away (I know misalignment issues when I see one and this one is bad!) And there it is. Go to y=0 and the trident is floating behind your head, when you move up and down, it floats off in some direction (it is neg x and pos x.) And I can never fix this. I have no texture packs installed. This is a fresh copy of 1.12.0.2 (updated from the 1.11 update) and it is probably the weirdest bug I have seen besides the sitting cat bug. Check those screenshots I have, you can see proof there. Thanks for the time reading this and please fix it, its bugging me.
This is a dupe of another one I couldn't find. Just delete this one.