Multiplus II settles amp down on phase 1

Hello and everybody a happy Easter…

I’m having a small problem, that i cannot figure out, maybe someone can help me.
My trading system random downgrades the amperage on phase 1.
This way i miss some kWh of buying (selling the same).
Peakshaving is set on 25A per phase.

If i look in Node-red the AC power setpoint of L1, L2 and L3 are more or less the same.
After a few hours, it suddely come back to normal.

Could someone point me in the right direction to look?
Thank you and kind regards,
Mark Mieras