Inconsistent training status across devices


despite I have activated on all my devices (Fenix 5 and Garmin Edge 530) the Physio Trueup feature, the training status and the training load are different across the devices.

For instance on my 530 the training status results "High Intensity" with a training load of 891. On the other hand, on the Fenix 5 the status is "Unproductive" with a training load of 754.

Like I said, Physio Trueup is active and the devices are always syncronized with garmin connect. I suspect that the Edge 530 calculates the traing load differently from the Fenix 5.

Any help is really appreciated.