Why when I want to share my track on facebook, this crap appears?
If by crap you mean the cropped image - it’s because Facebook auto generates images from the original page and ALL link post images should to be 1200px X 628px to fit accurately.
In that image the shared image is clearly too tall to scale cleanly into the window.
If you are sharing it from a brand page then you can copy/past the link into a post and can manually choose the image used so create on which fits. If you are sharing from your personal account then changing the image is not an option.
ok! Thank you! I will consider this