[readwritesplit] Unexpected internal state

Hi

I have 8 db servers running MariaDB 10.1.36 being balances by MaxScale 2.2.14

I am getting loads of the following errors

Sep 27 10:36:35 e4b01 maxscale[14069]: (39170546) [readwritesplit] Unexpected internal state: received response 0x03 from server 'db02' when no response was expected. Command: 0x03 Query: <not available>
Sep 27 10:36:35 e4b01 maxscale[14069]: (39170570) [readwritesplit] Unexpected internal state: received response 0x03 from server 'db02' when no response was expected. Command: 0x03 Query: <not available>
Sep 27 10:36:39 e4b01 maxscale[14069]: (39170800) [readwritesplit] Unexpected internal state: received response 0x03 from server 'db02' when no response was expected. Command: 0x03 Query: <not available>
Sep 27 10:36:39 e4b01 maxscale[14069]: (39170855) [readwritesplit] Unexpected internal state: received response 0x03 from server 'db03' when no response was expected. Command: 0x03 Query: <not available>
Sep 27 10:36:41 e4b01 maxscale[14069]: (39170873) [readwritesplit] Unexpected internal state: received response 0x03 from server 'db02' when no response was expected. Command: 0x03 Query: <not available>
Sep 27 10:36:41 e4b01 maxscale[14069]: (39170889) [readwritesplit] Unexpected internal state: received response 0x03 from server 'db04' when no response was expected. Command: 0x03 Query: <not available>
Sep 27 10:36:44 e4b01 maxscale[14069]: (39171049) [readwritesplit] Unexpected internal state: received response 0x03 from server 'db02' when no response was expected. Command: 0x03 Query: <not available>
Sep 27 10:36:44 e4b01 maxscale[14069]: (39171073) [readwritesplit] Unexpected internal state: received response 0x03 from server 'db02' when no response was expected. Command: 0x03 Query: <not available>
Sep 27 10:36:45 e4b01 maxscale[14069]: (39171085) [readwritesplit] Unexpected internal state: received response 0x03 from server 'db02' when no response was expected. Command: 0x03 Query: <not available>
Sep 27 10:36:47 e4b01 maxscale[14069]: (39171186) [readwritesplit] Unexpected internal state: received response 0x03 from server 'db02' when no response was expected. Command: 0x03 Query: <not available>
Sep 27 10:36:51 e4b01 maxscale[14069]: (39171307) [readwritesplit] Unexpected internal state: received response 0x03 from server 'db02' when no response was expected. Command: 0x03 Query: <not available>

But eveything is working fine, but filling up the log with the above error.

Any ideas would be great to get rid of the error.

Thanks
Steven