Hi Alexander,
I moved to new version 26.5 and here my results:
Please see:
Comparison(left-Csv, right-GeoPackage)
image.png (173.1 KB)
image.png (164.8 KB)
Test data(input/output/QGIS)
5331-Csv-GeoPacakge.zip (3…...Adjust according to your CSV layout GeometryColumn = "WKT", //...com/gis/net/geo-package/ If the issue persists, could you share a...