Hi @Tal_Shpon, it looks like the slider needs to be redrawn, when the tab with the second slider goes from Display none to display block. Since the initial state of the second slider is set to display none, the slider has not fully loaded yet.
I would use this custom code to redraw the slider: Webflow.require('slider').redraw();
This custom code function can be used with your custom code to redraw the slider, and should be placed before the return of false, for example:
$('.nav11').click(function() {
sliderdots.eq(0).trigger('tap');
Webflow.require('slider').redraw();
return false;
});
Save changes and republish the site, and see if that helps. Update all your nav functions with the code.
I hope this helps!