Hi!
There seems to be a bug on mobile (iOS). If you set the header to sticky with shrink amount and the user scrolls down, up (to the top end) and down again a few times, the header-background becomes smaller and smaller in height until it’s gone. You can see it on www.elschundfink.de.
Tested on MN8X2ZD/A Version 12.14, Safari.
Thanks a lot.
Regards,
Melissa