Strange issue with child aggregation

Hi,
for the last 4 days child aggregation is behaving strangely. When I go to the daily details, the data looks alright:

On the daily overview page however, the production value is taken from the exported value.

During the day the values are fine, as soon as the sun sets, the value for production for the day suddenly is incorrect.

I collect the values from three PV systems and a Powerwall. All values seem to be collected correctly, just when the day is done, production is changed. I have not changed anything recently and I have no clue how to solve this.

Does anyone here have a similar problem?

Many regards,
Thomas.

To explain a bit more what is happening:
In the morning all looks correct:

The value of generated and exported differ. This goes over the whole day, then suddenly after sunset the value of generated is set to the value of exported.

Same day, just a couple of hours later: Suddenly the value for the daily generation is wrong again in the overview (and of course in the calculation for the monthly values.