unless your node is special.
Standard PC running the default Linux client with basic cable modem connectivity. It's online probably 95% of the time, which would mean it could have missed a few reorgs. There could be an interesting story about that 6 block reorg. That does appear to be the biggest naturally occurring reorg.
hopefully a few more long time nodes can post and we can get a much clearer idea.
just having the second node confirm the 6 block reorg changes that from probable isolated node issue to a likely global reorg. and it wasnt that long ago, so the hashrate required would have been a lot. maybe it was during the DDOs attack?