Good morning.
I don't know if this has happened to anyone too, but I'm having a problem making a topbar fixed on mobile. Once you start scrolling and its position becomes fixed, it appears cut off, as if off the screen.
I have seen that it does not happen on iPhone phones, but it happens on all the Android phones that I have tested. I leave you the link to the website so you can see the behavior in real time: www.thebath.es
Thanks again!