Email messages do not merge in osTicket v1.10-rc.3

Hello

In osTicket v1.10-rc.2 when a user sent a email message with the same subject of an already created ticket, the email message was inserted as a new post on the  initial ticket.

For example:

1. The user-a@test.com send a email message to support@test.com with subject: "Need your assistance" with CC to user-b@test.com
2. A new ticket is created with the title "Need your assistance"
3. The user-b@test.com reply to all senders (with the same subject)
4. The message from user-b@test.com is appended to the original ticket.
5. So, there is just one ticket called "Need your assistance" with the messages from user-a@test.com and user-b@test.com
   

After the installation of the osTicket v1.10-rc.3 this behaviour was broken:

1. The user-a@test.com send a email message to support@test.com with subject: "Need your assistance" with CC to user-b@test.com
2. A new ticket is created with the title "Need your assistance"
3. The user-b@test.com reply to all senders (with the same subject)
4. The message from user-b@test.com CREATES a NEW ticket (with the same subject).
5. So, there are two tickets called "Need your assistance", one with the messages from user-a@test.com and the other with the message of user-b@test.com
   

Is this an expected behaviour? Or is it a bug?

What can I do to return to the original behaviour?

Thank you for your help, and sorry for my english! :)

Dante