Hello @Faze_Kaas !
It looks like a HDRI issue. A Background issue.
In the asset window you can see that the BG is the Epic buildings, so the mask reflects good since the whole stage is quite bright, but in your scene you can see that the mask is reflecting the clouds when you look it from below and that’s when it looks best.
Try adding a HDRI to your scene, an HDRI is a high dynamic range image that allows the reflections of the objects to be the ones that provide the image itself.
Or you can also use a Sphere Reflection Capture as the user above suggests. With a Sphere Reflection Capture the reflections will be generated according to your own scene, making the reflections more realistic (at the cost of a little more performance)
I leave you a link about HDRI information:
I hope any of this helps!