Sprite Mask shows up in play mode

I'm trying to create a title screen animation for a game, and the animation uses a sprite mask. It works perfectly in the editor but as soon as I enter play mode or a build I can see this weird hologram-like graphic appearing where the sprite mask is covering. I cannot find any information about this issue online; I may be the first one to see it. I'm using URP for 2D lighting, and I think an issue might be originating from that.

Any help with this would be greatly appreciated. I attached some images:


Editor:


Play Mode: