Square image in the middle of the Lucky Wheel

Hi there !

We spoke on the support forum and you asked me to open a ticket here (https://wordpress.org/support/topic/image-uploaded-in-the-middle-of-the-wheel-shows-square-instead-of-round/)

I have a problem. The image that I uploaded to be in the middle of my wheel (square image on white background) is not fitting. It shows the image suqare instead of round. Here is the screenshot : https://image.noelshack.com/fichiers/2019/47/5/1574437353-73523630-464007960904664-2070444660697858048-n.png The weird part is that it shows like that only on firefox for windows, not on chrome for windows and not on firefox for mac. Is there any solution ? Thank you !