When I am working through an observing list I will select an object. In the info screen, when I select "Create New Observation" nothing happens. I can see the little circle going around and around at the bottom of the screen.
If I go to "Show observations" there is an entry for my new observation. I can click on that entry and now I can enter my data on the screen. When I hit the "done" button, nothing happens.
To get out of that screen, I can just choose another object and continue on my way. Not the cleanest way to navigate through the screens.
I have a suspicion that perhaps your server is being overrun with data and can't keep up. This is just a supposition on my part.