I have an RT3 OUKITEL too. I had the same issues with it crashing when it was the default home launcher. I just swapped it out for the quickstep and had no further problems.
I then had an issue where DMD2 saw me at a previous location, I could even navigate from the incorrect location despite being online. For some reason as soon as I opened google maps it immediately reset to my current location. Previously it would seize up after 10mins riding. This also stopped once I had opened the google maps app even though on both occasions is was just open in the background.
Since then I had a full days riding with none of those problems.
I did have an issue where I locked the screen as it was raining, the lock icon and the 2 either side of it disappered until I went to the home screen and returned to the map screen.
I love the app and appreciate the complexities of it creation. Keep up the good work guys you are doing an amazing job with it. btw the group icon is brilliant and whilst only 2 of us have the app at this point in time, sharing visually each of our locations along with call for help option is an important and very helpful addition.
