Hello,
1. Please read in the documentation how to style Wishlist button: https://www.8theme.com/demo/docs/legenda/index.html#!/wishlist
2. This is Woocommerce update, not of our theme.
3. Your original image is too small – 350px × 145px. It should be 2 160px × 2 349px approximately or a bit less. Try to reupload the original image in higher resolution and check it again.
Thank you. Regards, Eva Kemp.
