Can you share an OML?
What may be happening is you have a pointer-events none or a z-index, not sure, but I am sure you have an overlay even on the menu and that's not what you want. But you can do your own inspect and try to find out. But if you can please, share your OML, I can't replicate the bug.
But try to put this on your theme.
.menu-visible .app-menu-overlay {
opacity: 1;
pointer-events: auto;
-webkit-transition: opacity 330ms ease-out;
-o-transition: opacity 330ms ease-out;
transition: opacity 330ms ease-out;
}
.app-menu-overlay {
background-color: rgba(0, 0, 0, 0.25);
height: 100vh;
left: 0;
opacity: 0;
pointer-events: none;
position: fixed;
top: 0;
-webkit-transition: opacity 130ms ease-in;
-o-transition: opacity 130ms ease-in;
transition: opacity 130ms ease-in;
width: 100vw;
will-change: opacity;
z-index: 104;
}