Light reflection in mirror issues

Hello community!

I’m having some issues with a scene that I’m working on. Let me add an image to help me get the idea across. 6314599912bc438a0747d1f7defc2a8a2abd7916.jpeg

As you can see, in the reflection of the mirror there are some strange square looking artifacts where the light reflection is. I have no idea what is causing them or how to get rid of them, and all I’ve tried so far is to pump up the reflection resolution under the render engine settings - to no avail. The artifacts are still present, and haven’t improved one bit.

Do you guys know how to get rid of them? Which settings should I tweak to get a nice clean image in those areas?

Thanks for your time,