hadn't used modrana for a while - tried yesterday &can confirm Petur's finding - I entered a route (using custom search for destination). I drove to the destination with navigation enabled. Then I went to enter a new route. I selected "address to address" and then selected "location as start". I then tapped "destination", to enter a postcode, but nothing happened (the tap was registered as I heard/felt it, but the app didn't provide the normal text entry field). I retried several times, tried exiting & re-entering the menu etc. but no joy. Eventually I exited & restarted modrana itself, and I was then able to enter my new destination address.

Petur's other gripe (tapping the screen turns off auto-centring) used to really annoy me too. I'm pretty used to it now but I'd agree that the status of auto-centring should NOT be affected by any "brief" tap if that is possible - IMHO, only a purposeful long tap or drag should be taken to indicate that the user no longer wants to have centring active. I don't know how easy that would be to implement, and TBH it's not a biggie if it would be difficult/time consuming.