Chris,
Over 5 times this has happened. I feel like I'm getting PUNK'D. Yes traffic declines on those days then picks up. And no changes on the website lol literally just poof gone out of thin air for a couple of days then comes back
Bill,
I've tried both! I used incognito and I also have a VPN that changes my I.P address every couple of hours and I've been logged in. I've also checked on completely different networks like my office or my home..
My rankings on other search engines stay the same, it's only on google where it's been weird.