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I have carried this as an experiment - perhaps it could serve as an additional datapoint which might help the OP or somebody else with further investigation. I have tried including the tags from the curent revision of the question as my favorite tags, and start adding some of the ignored tags. The results of the experiments are below. Incidentally, it ...


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This was unexpected fallout from a change that was intended to limit the impact of requests with an excessively large list of tag criteria. The issue related to a very large number of ignored tags. I have revised the limits while I investigate further. Sorry for any disruption.


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