Discharge to grid with DESS and Venus 3.52

I just updated to 3.52 and recognized that DESS is discharging the battery to grid with round ablout 500-700W.

After deactivating DESS discharging stops immediatly.

Battery SOC was at 81%
Battery Care Mode is off
DESS is running in green Mode

Selling price is always 0.078 €/kWh
Buyin price is 0.2049 €/kWh

So there is no reason for discharging. Or?

As you can see, at 15:19 I updated the Cerbo. After this update discharging starts .
At 15:22:30 turn DESS off and started the DESS again at 15:23:00.

Update: 17:05
Buying price is 0.2315 €/kWh
Battery SOC 79%

After activating DESS, no unnormal discarge to Grid.
Grid setpoint is -10W and never changed today.