I discovered the bug when using a command block to make a skeleton turn invisible and use it for a security camera, it did make the skeleton invisible but the skeletons bow was still visible, moving in the same direction as I did, I decided to restart minecraft, all that did was enlarge the size of the bow, and I did not know anything really how to fix it.

The way I discovered the bug was using the command 'effect @e[name=camera1] invisibility 100 100 true' in a command block. Then I re-named a name tag to 'camera1' and named the skeleton.