I think I'm having an issue related to csv_split, namely if one of my rows has a last column null value it looks something like this:
id,A,B,C
1,1,2,3
2,1,2,

and tippecanoe gives me an error that the number of columns is not correct for id=2, I'm forced to put an artificial "NULL" value there (which is a problem for me later because it's supposed to be an integer value, but 0 and -1 are used)