I created a flashlight containing a ring mesh to create a shadow effect that you would typically see on a flashlight. The ring is placed in front of the part containing the spotlights. All of the parts that make up the flashlight are welded to its handle. When holding the flashlight out the ring shadow is a bit jittery. I am unsure if this is a lighting issue or the actual part glitching.
I was not able to find a post regarding this. If someone finds one please reply with its link. The only things I have tried are turning collisions off and turning massless on. Neither of these fixed the issue. Below is a video of the issue and a picture of the setup for the flashlight.