Hi,
since the upgrade ti joomla 3.8.11 and the installation of vertex patch, I have noticed that when I switch to mobile view (i.e. below 732px of width) the class of body element is changed from its original value to this: .s5_responsive_mobile_present, destroying any css link to it.
The solution should be not to remove the original class with .s5_responsive_mobile_present, but to add it
Thanks,
Matteo