Catch Fullscreen, bugs and small issues

Howdy I'm considering purchasing pro version, but first I would like to ask if there is any solution for the menu that does not display correct and the small glitch that occur when scrolling? Menu does not show correct when menu button is in bottom of page. The small glitch when scrolling in pages, is like the header separate to page and when you scroll back to top it disappears. These issues is on all devices and formats, computer, pad, phone. I've also had a look at your demo page, same issue here. I think these problems came after an update in late December. Previous version was ok none of these problems. Looking forward to your reply