Hi Patrick,
Probibly sometimes there is something wrong with your patience? The site is perfect and works in that way! Sometimes a browser fails, or sometimes your computer. Mostly it is the person behind the screen! to hasty, no patience, pulling wrong buttons etc!
I use this site for years; placed many pictures and sometimes, they are working on it. Yes an update every now and than, but telling us when the site is out of order. Otherwise the failure is NOT Marine Traffic. Be sure of that!
Don't get sky high as a rocket the first second. count to ten. It maybe can help you?