Apologies if this has been mentioned before (TMO's search feature is a bit basic) - I imported a GPX file and followed it successfully from beginning to end, then on the way back I tried to reverse the endpoints, but that didn't do anything.

I am guessing that this isn't a feature, so perhaps the option in the menu should disappear in "GPX file" mode. I did follow the route backwards, but the pointer would actually go backwards too, which is quite fun

I would have been quite happy with being able to follow the reversed route, even if that wouldn't work in most cases as you go against traffic.

Side note: the ETA for bicycle mode assumes you're faster than an olympic cyclist, perhaps that should be adjusted too