In reply to
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Think I had something similar happen (with a custom “bridge,” though, not Twitter or anything) because it—or rather, I—couldn’t properly determine publish dates for the stream I was looking to “bridge.” Can’t recall if its feeds are generated on the fly, but if so, it could be that RSS-Bridge sets new dates all the time, confusing feed aggregators. Could also be the actual content keeps changing (due to ads or so), but most readers would simply ignore such updates.