audit_log json is not escaping characters properly

[Alle]

Hello,

On logstash reading the audit_log, I receive this error message with some audit_log entries:

{:timestamp=>"2016-02-22T06:37:55.645000+0000", :message=>"JSON parse failure. Falling back to plain-text", :error=>#<LogStash::Json::ParserError: Illegal unquoted character ((CTRL-CHAR, code 9)): has to be escaped using backslash to be included in string value
 at [Source: [B@53033860; line: 1, column: 344]>, :data=>"{\"audit_record\":{\"name\":\"Query\",\"record\":\"289492725_2016-02-17T11:18:32\",\"timestamp\":\"2016-02-22T06:37:54 UTC\",\"command_class\":\"insert\",\"connection_id\":\"97602\",\"status\":0,\"sqltext\":\"INSERT INTO XXXXX (ID, MESSAGE_ID, SERVER_ID, RECEIVED_DATE, STATUS, CONNECTOR_NAME, SEND_ATTEMPTS, SEND_DATE, RESPONSE_DATE, ERROR_CODE, CHAIN_ID, ORDER_ID)\\n\t\tVALUES (0, 742570, 'f8d013f6-1a85-41ea-a54d-79a216a62141', '2016-02-22 06:37:54.691', 'R', 'Source', 0, null, null, 0, 0, 0)\",\"user\":\"user[user] @ host.com\",\"host\":\"host.com\",\"os_user\":\"\",\"ip\":\"10.0.1.203\"}}", :level=>:error}

This is running on mysql 5.7.7 and the latest audit_log plugin.

mysqld Ver 5.7.11 for Linux on x86_64 (MySQL Community Server (GPL))
Linux db5 3.13.0-76-generic #120-Ubuntu SMP Mon Jan 18 15:59:10 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

Regards
Alessandro