Integration Services :: Unexpected CRLFs In Middle Of Row For Flat File Destination

I have a SSIS job which takes a SQL Server view as its source and outputs a flat file. The file is quite large, about 20000 rows of 30 columns and up to 400 characters per row. It is configured with CRLF at the end of each line, tabs between columns, and no header row. Most rows are output with no problems, but occasionally a line will include a line break (CRLF) in the middle. The problem appears random, but the rows with spurious CRLFs appear in clusters, with each row in the cluster having a line break after the same column. To illustrate, it looks something like this:

col1 col2 ... col 30
col1 col2 ... col 30
col1 col2 ... col 24 CRLF
col25 col 26 ... col 30
col1 col2 ... col 24 CRLF
col25 col 26 ... col 30
col1 col2 ... col 30
col1 col2 ... col 30

So although there is some pattern, where a group of lines will include a break in the same place, I've not been able to identify the pattern and relate it back to the data items.

What could possibly cause CRLFs to spontaneously appear midway through the row?