I am using GP Premium with WPPizza restaurant plugin. The WPPizza plugin has a short code for displaying all the items in a food menu, grouped by category, and unless explicitly directed using a “no-header” directive will display the category headers.
The problem is that GP appears make these headers invisible- they have a class wrapper (.wppizza-entry-title), and when you access developer tools (chrome or firefox) and search they to greyed as invisible elements.
Switching to other themes brings them back – this behaviour is consistent accross all browsers and devices I have been able to test.
So in the first case – and this is the same across 8 other themes I tried the Category Heading is shown.
Switch to GP and the Category Heading becomes invisible.
for now I have nuked the site, reinstalled wp and restoring manually to try and isolate it from other plugins, we will soon see if it is GP or if it was some other plugin I had.