PV Inverter measured by ET112 on AC Input 1 shows consumption as production

[geo99918]

Hello,

as can be seen in the picture a PV inverter (Huawei) on the AC Input 1 of the Multiplus-2 shows that it's producing 3-4 W even if it's actually consuming. The screenshot is at night with the PV inverter in idle mode.
The Huawei is measured by an ET112.

At day the values are correct, positive values = production.
But when Huawei transitions to idle mode at dusk I can see the values going negative for a few seconds (-4W) then 0 for a few seconds then +4W.
I think that for this reason the Multiplus-2 doesn't go into idle mode, it thinks that the PV inverter is about to produce some significant power and it remains in bulk mode, not depicted in this picture as I'm working on the battery.

thx,
Geo