Ip's being reshuffled didn't happen at least here. We lost power for 3.5 days and I was surprise when the power came back the DHCP server gave me the same IP. It's like winning the lottery.
All you're saying are guesses, I want a factual answer and I posted to get an answer and not to argue. I want to know why the gateway used to ping 30ms and now answering @2000ms or not at all.