I've not seen it for a day or 2. And I found a bug in the code that potentially opened multiple (never more than 3) connections and only closed one of them (they all had the same identifier!) That can't happen now, hopefully that was the cause of the issues. But this forum isn't the most active place, it's difficult to know If I'm alone with the errors, particularly when they last for ~10 seconds (even if regularly), if no-one spots, or reports or does so here.