Hi Mario,
Within view port having screen resolution is smaller than 920px, your site will load layout for small screen / tablet in which the menu or position-1 are hidden.
If you still want it shows the layout of medium screen / desktop, you will need change the media jQuery breakpoints via this less file: templatesja_bookshoplessvariables.less
// Extra small screen / phone
// Note: Deprecated @screen-xs and @screen-phone as of v3.0.1
@screen-xs: 480px;
@screen-xs-min: @screen-xs;
@screen-phone: @screen-xs-min;
// Small screen / tablet
// Note: Deprecated @screen-sm and @screen-tablet as of v3.0.1
@screen-sm: 768px;
@screen-sm-min: @screen-sm;
@screen-tablet: @screen-sm-min;
// Medium screen / desktop
// Note: Deprecated @screen-md and @screen-desktop as of v3.0.1
@screen-md: 920px;
@screen-md-min: @screen-md;
@screen-desktop: @screen-md-min;
// Large screen / wide desktop
// Note: Deprecated @screen-lg and @screen-lg-desktop as of v3.0.1
@screen-lg: 1180px;
@screen-lg-min: @screen-lg;
@screen-lg-desktop: @screen-lg-min;
Decrease the value: @screen-md: 920px; to suit your need
Once done, go to Backend > Template manager > and hit the ‘LESS to CSS’ button (remember to BACKUP all current css files first as when compiling LESS to CSS, they will be overridden)