Reversing route only works once

[hikemaniac]

When planning a route and pressing the "reverse directions" button, the two points are swapped. However this only works once:

The directions are not reversed and the original input is changed to coordinates and not changed back to an address again. Can someone please fix this misbehaviour?

I tested this on both Firefox 57.0.4 and Safari on Mac OS X 10.10.5, the bug remains.

[tomhughes]

I did try to make it work but it's quite hard because the geocoding is not always reversible so it can sometimes get stuck as you are seeing.