Exported pdf/png has black areas depending on zoom/screen size

lackDescribe the issue:

When exporting dashboard to pdf or png while zoomed out enough (e.g. 90% zoom in chrome) or when using a particular screen size I get a grey shading area on the resulting pdf that’s not seen in the browser (see image for example).

Does anyone know if there’s a setting or something that can avoid this happening? Perhaps something that forces zoom level/screen size for pdf/png while exporting.
I’ll also be interested if other people can replicate this behaviour.