If all translations in a document is translated by using copyTrans, 'PO-Revision-Date' header in downloaded po file will be empty.
This is due to Zanata is checking if there's a translator attached to the target when generating 'PO-Revision-Date' header.
Hi . This brought hell down upon the release branch, bringing in all sorts of changes from master (including changing the pom versions to 4.0.0-SNAPSHOT). At least it was a squash merge, so it was easy to revert.
I had to revert commit 3ba80cd49105cb425721b3aa3af2a40ec30f4403. I recommend you branch from release again, and cherry pick the commits from https://github.com/zanata/zanata-server/pull/1191 to get the bug fix. Then can test the new pull request.
My bad. Rebase with wrong branch.