The solution starts with checking what the device actually send. You can see it in the log.
You also forgot to mention what version you're using. And what report configuration.

I solved the problem with this setting circled in red. I am using the latest version 6.12.2
Thanks
That used to happen when a device lost network and sent stored data, time vs distance ended in a reversed distance calculation.
Can't tell if is not still happening.
it's possible...the two devices I noticed it on had been without a battery for a long time...and on the first drive somewhere in the middle of the trip this calculation appeared
Hello
I am noticing strange and incorrect data in the report of some devices.
Is there a solution to this problem?