Hey @Aad_Werf_van_der! Did you figure this out? I wonder if it’s something related to the way the address is formatted and the way the application you’re loading the CSV into is processing.
CSVs are separated by commas, so the Address might be interfering (although this shouldn’t be the case).
If this is still the case, I’d recommend opening a bug report for it following the steps in this topic - Wix Studio - How to report a bug