"Query could not be parsed" errors

Not using filters or SSL. Not the same as MXS-1329.
See attachment for maxscale.cnf file with redaction.

Receiving the following error:

2018-02-20 23:32:26 error : (452) [qc_sqlite] The provided buffer does not contain a COM_QUERY, but a COM_QUIT.
2018-02-20 23:32:26 error : (452) [qc_sqlite] The query could not be parsed. Response not valid.
2018-02-20 23:33:16 error : (514) [qc_sqlite] The provided buffer does not contain a COM_QUERY, but a COM_QUIT.
2018-02-20 23:33:16 error : (514) [qc_sqlite] The query could not be parsed. Response not valid.
2018-02-20 23:33:17 error : (512) [qc_sqlite] The provided buffer does not contain a COM_QUERY, but a COM_QUIT.
2018-02-20 23:33:17 error : (512) [qc_sqlite] The query could not be parsed. Response not valid.
2018-02-20 23:33:22 error : (528) [qc_sqlite] The provided buffer does not contain a COM_QUERY, but a COM_QUIT.
2018-02-20 23:33:22 error : (528) [qc_sqlite] The query could not be parsed. Response not valid.
2018-02-20 23:34:05 error : (584) [qc_sqlite] The provided buffer does not contain a COM_QUERY, but a COM_QUIT.
2018-02-20 23:34:05 error : (584) [qc_sqlite] The query could not be parsed. Response not valid.
2018-02-20 23:34:14 error : (592) [qc_sqlite] The provided buffer does not contain a COM_QUERY, but a COM_QUIT.
2018-02-20 23:34:14 error : (592) [qc_sqlite] The query could not be parsed. Response not valid.
2018-02-20 23:34:50 error : (637) [qc_sqlite] The provided buffer does not contain a COM_QUERY, but a COM_QUIT.
2018-02-20 23:34:50 error : (637) [qc_sqlite] The query could not be parsed. Response not valid.
2018-02-20 23:35:01 error : (654) [qc_sqlite] The provided buffer does not contain a COM_QUERY, but a COM_QUIT.
2018-02-20 23:35:01 error : (654) [qc_sqlite] The query could not be parsed. Response not valid.
2018-02-20 23:35:09 error : (668) [qc_sqlite] The provided buffer does not contain a COM_QUERY, but a COM_QUIT.
2018-02-20 23:35:09 error : (668) [qc_sqlite] The query could not be parsed. Response not valid.
2018-02-20 23:35:25 error : (687) [qc_sqlite] The provided buffer does not contain a COM_QUERY, but a COM_QUIT.
2018-02-20 23:35:25 error : (687) [qc_sqlite] The query could not be parsed. Response not valid.
2018-02-20 23:35:54 error : (721) [qc_sqlite] The provided buffer does not contain a COM_QUERY, but a COM_QUIT.
2018-02-20 23:35:54 error : (721) [qc_sqlite] The query could not be parsed. Response not valid.