With the previous patch on this bug, these preventions are no longer necessary. Whilst we could keep them, it means that the behaviour of configuration engines are different to other engines. It might also prevent internal updates happening, which we might need sometimes (e.g. for bug 2043189).
In future we might want to do something more extensive with not sending out unnecessary internal notifications, however these are generally not hot paths, so that might be something we think about at an opportune time.
Differential Revision: https://phabricator.services.mozilla.com/D310847
Mark Banner
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