There seems to be a strange behavior with maxscale when resetting a connection, after having a failed prepared statement.
error is "Unknown prepared statement handler (4294967295) given to MaxScale (1243) "
4294967295 correspond to -1 => this is usually use by COM_STMT_EXECUTE to indicate to execute last prepared statement. mariadb_stmt_execute_direct might send a COM_STMT_CLOSE + COM_STMT_EXECUTE with id -1.
I don't understand what can cause this, because error occur on reset, but there is a strange behaviour with maxscale with this special "-1" feature.