Mysterious -Replication and Work flow document

Hi ,We have a application that run in cluster environment.

Now a document is process through the application and is router through ten approval cycles.

Problem.

The document that has went successfully through all the approval cycle is written . As a result of which it is back to step 3 .

This does not happen to all the document that are approved.

It happens only few times a month and cannot be predicted or Reproduce.

I feel that the replication is rewriting the document.

Any Thoughts are appreciated.

Thanks

Sushant