I recently upgraded to 6.5.3 Royal Theme from 6.5.2. It breaks mobile responsiveness. The hamburger menu no longer displays on mobile. Also the page appears to fit in window as oppossed to breaking down into columns. (JS Composer). In addtions mega menu is broken and only displays a single column.
I tried disabling all other plugins and it still occurs. So not a conflict.
I rolled back to 6.5.2 and all functionality was restored.
I guess I’ll just wait for the next version, hopefully this is fixed