T series 0 export doesn't (partially) work

[luksas.art]

For some reason, I need to ensure that I have no exports, and my current setup includes a Foxess T6-G3 and a Chint DTSU666 (60A) smart power meter, both of which have been installed and configured according to the Foxess documentation to achieve 0 export. Additionally, I have updated the inverter firmware to the latest version.

While I can see my energy consumption on my grid supplier's website, I have noticed that the data does not match the information provided on the Foxess cloud platform. Specifically, I have observed that the smart meter indicates some power is being exported, and the grid supplier's data confirms the exact same amount of energy being consumed, which suggests that the smart meter is functioning correctly. However, the cloud dashboard on the Foxess platform shows 0 export and 0 grid consumption even during the same time periods when the grid supplier hraphs shows consumption.

I understand that the exported energy is considered "consumed" on the grid supplier's side, but it does not explain why the inverter exports energy in the first place.

So I want to understand why 0 export functionality seems to be "leaking" some energy to the grid

what I see is that ±33% of generated energy from solar to be consumed in the house gets leaked to the grid...