Shadows have a white background on dark surface

Hi all,

I am having a big problem recently regarding the shadows I am applying to anything.

Whenever I am adding a shadow to an object that is on a dark surface, Figma creates a weird white/transparent shape around the shadow. At first I thought it was only an error of showing it in the program but the sad reality is, that it shows also in the exports.

Using Figma Desktop.

Why is this happening? Is there a solution other than just accepting it?

Thanks in advance