Make sure that app has the full permissions it wants to use the GPS of your phone. But it might be battery optimization on your phone that is messing it up. So check that and don't let your phone restrict battery time for that app or put it to sleep.
Still, this is one place where a dedicated GPS Cyclometer might do better for you if it's going to bother you about the inconsistencies. Not to say that you won't be bothered by other weird goings on with the dedicated GPS.
I thought you used a dedicated GPS/Cyclometer. Does it not pair to the MapMyRide App? RWGPS has a phone app. You might try that. Out of the big three for making routes, I've always preferred RWGPS.
Last edited by Iride01; 03-12-24 at 07:31 AM.