GPS tracking is not working

After the last update the GPS tracking isn’t working properly.
It tracks for the first 5 mins autonomously then stops until you poke it again.
Not an issue of GPS coverage, I’m running outside, in Paris.
The previous version of the app was ok.
In my case, since I only touched my iPhone before beginning the run and while ending it, the tracking shows I took 35 mins to run 50 meters instead of 7km.
Please update it. Switching to another app in the meantime.

ZeRochaGoncalves about adidas Train & Run, v4.1