I have a little fix for you, it’s not perfect, there still some movement on the title, the category and the headers-icons, but the header bar will stay in place.
On desktop css
@media screen and (min-width: 1144px) {
.mfp-zoom-out-cur .d-header > .wrap {
transform: translateX(-8px);
}
}
I didn’t test this through and it’s not something official at all, but for now you can try it. I’m not experienced enough to find a better solution off the top of my head