unknown bug causing long lines in CSV output

[rigid]

it seems as there is a bug which manifests in two recent CSV files, causing ultra long lines by repeating fields over and over. It seems, all affected lines have the field "wn_africa" repeated multiple times.
The two affected files I found are:

events.full.20150630.txt:

length	line number
740892	284
740891	170

events.full.20150701.txt:

length	line number
740892	258
740891	1189
740886	1108
704287	2121
704287	1400
740886	1143
704287	2181
704287	1450

downloaded from:
https://s3.amazonaws.com/openeventdata/current/events.full.20150630.txt.zip
and
https://s3.amazonaws.com/openeventdata/current/events.full.20150701.txt.zip