distance bug: after riding 39km with a levo specialized, suddenly distance is going weird

Which way is your Levo connected to your Edge?
-as speed/cadence sensor (and power sensor)?
-as ebike?

Does speed display also wrong values?

Edge is connected by bluetooth. EBike has speed/cadence/power sensor but the bike display is correct. 

Speed goes up at 25km/h and stay blocked there when the issue happen.

Issue only happen after some hours of biking.

Issue is only about distance, elevation works well. 

I have a 2019 Levo and 1040.

I suggest to connect the Levo as power sensor and as speed/cadence sensor over ANT+ (not Bluetooth).

But I have to admit that I only have the Levo connected as a power sensor because it doesn't work reliably as a speed sensor. I have connected a Garmin hub speed sensor for the speed. (All via ANT+)

Seems after some killometer the speed is frozen around 26 km/h on the garmin and you need to shutdown the Levo and turn it on again to fix the issue

Seems after some killometer the speed is frozen around 26 km/h on the garmin and you need to shutdown the Levo and turn it on again to fix the issue

Have you changed to ANT+ connection? You should.