One of my hunters (David Skinner, Brisbane) just reported an issue with the app, that upon investigation I am having exactly the same issue (I’m on iPhone).
When you click on Explore and search for a city, the city names are then listed below, however clicking some cities seems to have no result, ie there is no response at all from the app.
I just added David as a hunter in prep for a trip to Tasmania to Hobart, Launceston and Sheffield. All of these cities are non-responsive, as are some others (eg Heyfield), while some work fine (eg Melbourne, Brisbane, Sydney, London).
This is probably the same issue that was reported recently for Southend-on-Sea.
We’ve now created a fix for this bug. An updated version of the Android app should be available within the next 2 days, and an updated iPhone app should be available early next week.