Trouble searching multiline text field with long string

[ddshellback]

I have a multiline text field called command with the Wiki renderer turned on that contains command line strings with base64 encoded data.  I am able to successfully search using command ~ "foo.exe /-foo /-foo" which returns all fields with that pattern.  But when I add the base64 encoded string to the end of the query string it returns no records.  I created an issue with a shortened string for ease of troubleshooting.  Here's the query that fails to find the record.

command ~"foo.exe -foo -foo DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd"