My apps have disappeared, while they are still shown as installed in my dashboard. Please have a look. My test website is: https:/centrical.com - installed apps are Unless (personalization) and Swiftype (search). The latter is easiest to detect: there should be a floating search box.
Update: they are back. By the way, the support ticket box gets always stuck at “diagnosing website” step. That’s pretty discouraging.