Shortcode still showing on mobile

I’ve used Widget Options to disable Sidebar Widgets for a shop on mobile devices, which worked great so far.

Now I got a shortcode in a simple text to display the category thumbnail (added through functions.php) which still shows up, even though I already checked not to show on either mobile or tablet.

I added “!wp_is_mobile”, which works fine for everything but iPads..

Any suggestions, solutions or ideas?

Cheers!