Yeah it's not the block, that's when a certain large miner fails over with more SPS than the whole pool
It's no problem, just delayed heartbeat messages and that's why darth vader shows up.
I have stats that show me the numbers every 15 seconds, and I also get the hearbeat alerts each time that shows me all the stats, and it is just heartbeats so it doesn't matter.
However, that was what I was referring to here about changing for that miner:
https://bitcointalk.org/index.php?topic=789369.msg39932683#msg39932683

... and lulz a certain person's double hack to work around it coz he can't control individual miner work difficulty with ckpool