Wrong speed data

[paultranvan]

This is an actual trip section, where the speed is wrong - it should be 187 km/h:

And the associated data, that show false data:

"duration": -5025.138000011444,
"speeds": [
  0,
  14.098038471979239,
  14.098381654192648,
  14.098724829652095,
  14.09906799832621,
  14.099411160224314,
  14.099754315335623,
  8.020515177915986,
  -49.91457013852098
],
"distance": 262612.4730699693,

Somehow, the displayed duration is correct, despite the data being negative. But the average speed is computed based on the speeds array, while we could compute it directly from duration and distance.