Hi @blindaman,
Greetings. Hope you are doing well.
Regarding your query, I have checked your issue and found that you have used a 3rd party plugin content inside the EA Advanced Tabs. The 3rd party widget somehow could not be added its all the classes on the first load and this is why you are facing the issue.
On the page load the container classes is –
tribe-common tribe-events tribe-events-view tribe-events-view--list alignwide tribe-events-view--shortcode tribe-events-view--shortcode-4f9b6411
When resize the window then the container class is
tribe-common tribe-events tribe-events-view tribe-events-view--list alignwide tribe-events-view--shortcode tribe-events-view--shortcode-4f9b6411 tribe-common--breakpoint-xsmall tribe-common--breakpoint-medium tribe-common--breakpoint-full
So these classes is added after resized the window –
tribe-common--breakpoint-xsmall tribe-common--breakpoint-medium tribe-common--breakpoint-full
For reference please check this screencast – https://d.pr/v/eaVVPe
Though this issue is not from our plugin end but I am sharing a custom JS that will fix your issue on all pages. Please add the below custom JS to your site and check. Hope this will help you out.
jQuery(window).on('load', function(){
jQuery(this).trigger('resize');
});
Thanks and Regards.