Leica Stereomicroscope additional light spots

We noticed recently something weird about the light coming out of our Leica M205FC. There is a central light spot and on higher magnifications, smaller peripheral spots appear (see picture attached). The fiber looks ok, the apo lense as well. Does someone know if this is normal for this kind of stereomicroscope? Leica asks for ~890 EUR to just come and take a look.