Apple Menu Issues

Some Apple users with Safari browsers on iMac, iPad or iPhone have reported problems with the menus on this website. What seems to happen is the first tap on a menu doesn't do anything, after which a second tap on any menu works OK.

Not all iPhones seem to suffer from this. I'll do what I can to sort it out, but I'm not an Appley Dappley user myself. If anyone can narrow down more detail on when it does or doesn't happen please let me know and I'll try and get it fixed. Thanks.