How to reproduce the "error":

1. Type in an existing city (say Hamburg) and click the button
2. Click on "Get Directions from another place" (will appear just above the map)
3. Type in a not existing city (say xxxxx) and click the button
   • The visual and textual directions disappear
4. Click on "Get Directions from another place"
5. Take an existing city again and click the button
• Polyline does not show, no blowup appears when clicking on any step
6. Redo 4. and 5.
   • This time everything works fine