3D FlipBook - Menubar missing on Safari on IPhone - version 1.11.1

Hi all, I upgraded on yesterday at 1.11.1 my licensed version, due to an issue on images and menubar on Safari 14.8 on IPhone 12. I uploaded your demo version on my test site at: http://centauri.proximainformatica.com/bookreader-widget/ and my iphone issue image at: http://centauri.proximainformatica.com/bookreader-widget/books/image/theKingIsBlack/iphone_menubar_bug.jpeg On Chrome on Android all is good. On Chrome emulator for IPhone X all is good. Please take a look. Thanks. Maurizio