Problem, Octane and Jira attached files just sync the first time

We have Octane and Jira sources.  some fields are mapped for both direction sync, one of the is attached files.

Jira:
- If the master is Jira, and we have 3 files attached, after the sync only one file will be sync in Octane.
- MF CC will still trying to sync the  others 2 files but without result
- Neither, if we add more files, they are not going to be sync, but MF will keep saying the quaintity of the total attached files.

Octane:

- If the master is Octane, and we have 3 files, the first sync, all of them will be sync to the Jira data source
- After it no other files will be sync, doesn't matter the direction of the sync.

im using MF CC 4.2

 

any suggestion?