Ciao ​@Scab76. I've just tried to translate your question. Are you referring to the route? You can download it for offline use. Could you confirm have I correctly get your request?

Hi ​@Vincenzo, I don't speak French either, but this is what Google translate says:

Hello. I have Strava on my phone, which is sitting on my handlebars. And every now and then, the connection gets lost. I end up with strange paths and false stats. Is it possible to recover an effort?

So it seems that ​@Scab76 is losing GPS signal when using Strava on the phone during a ride. 

As far as I know it's not possible (at least not within Strava) to correct the workout path/route if the GPS went all wrong. But here are are some recommendations to correct/prevent some glitches: https://support.strava.com/hc/en-us/articles/216917707-Bad-GPS-Data

Thanks for your answer. 

I am frustrated to loose thé signal in thé middle of my race.