In T89940 we replicated open patchsets from Gerrit to Diffusion as a way of keeping feature parity with gitblit.
The downside of this is that for gerrit changes that go through many iterations (which is not uncommon and a good thing) will 'spam' the associated task(s) with the updates.
- On a per-repository basis a Repository-Admins can edit eg https://phabricator.wikimedia.org/diffusion/LSTD/manage/actions/ and
set the "Publish/Notify" setting to "Off"click "Disable Publishing".
For the purpose of this functionality, see this exchange on the referenced task: