ParaView v5.7.0: csv-export broken ...
There is a bug in v5.7.0:
If you try to export a line with csv-export and this line consists of more then one segments all older version of ParaView (e.g. v5.6.2) will write out one file for each segment, e.g line_0.csv and line_1.csv (in case of two segments). Trying the same with v5.7.0 you will get only line.csv which consist of the data of the last file (line_1.csv).
So it looks like the name generation for the different files is broken and all data is written again and again in this one file. So finally the last segment is in the file line.csv. Using the vtk-export instead the different file creation works fine.
Attached is a simple demo case. csv_bug.pvsm
Addon: the new version changes further on the order of the fields: