Hi Alexander,
I moved to new version 26.5 and here my results:
Please see:
Comparison(left-Csv, right-ShapeFile)
image.png (187.7 KB)
Test data(input/output/QGIS)
5329-Csv-ShapeFile.zip (46.5 KB)
Thanks,... Comparison(left-Csv, right-Shapefile)...// or ';' depending on your file Encoding = Encoding.UTF8, //...