Training load only half for comparable trainings since 3 days

Hello,

I have the following problem with my garmin devices / garmin connect:

Since 3 days the training load for a training, that I repeat since 5 years, is only about 50% of the initial training load.

Here an example:

Training 1 - Biking (about 1 week ago):  distance 23,94 km / 180 W (with powermeter) / training load 130 / aerobic 3,4 / anaerobic 2,0 / HRavg = 135 / HRmax = 161

Training 2 - Biking (same route): distance 23,35 km / 220 W (with powermeter) / training load 66 / aerobic 2,9 / anaerobic 0,0 / HRavg = 148 / HRmax = 165

I have the same problem with swimming.

Between the trainings I have only changed the phone (both iphones).

I have used the same edge 530 (with powermeter and garmin HRM pro) for biking and Fenix 6pro for swimming.

Did someone experience the same problem or can someone help me with this?

Thank you in advance!