Hello, Solarix,
I checked information and would like to inform that we have same similar issues like yours in firmware 1.14, but it was fixed with later firmware releases.
Like you mentioned, the correct APN for Lidl-Connect-SIM is web.vodafone.de.
Please try to set this APN as manual and check if it working correctly.
In case issue still persisting, please inform.
Best regards,
Sigitas