When I search for some issues and navigate to a result by clicking on its title, I get to see the issue's details. But if I click "Edit" (or something other action button), I only get a busy indicator and nothing happens.
I noticed that this happens only when navigating from the search. In this case, the URL contains not only the issue's key, but also the id of the filter (or the jql string). As soon as I remove this additional information (bringing me to the default view without a "back to search" link etc.), editing works again.
I get the same problem when using the detail view instead of the list view in the search. I can click on all the action buttuns, but nothing happens (except for the busy indicator).