Shadows acting weird

Since just recently I’ve discovered a weird thing happening to the shadows in my game. The shadows get kind of chopped off in a weird way and sometimes stripes appear inside of them. Is this a Roblox bug? Is it something I’ve changed or done? What can I do to fix this? image image Any help is appreciated!

It is a roblox bug but it can also be to do with your graphics settings. What are they currently on?