I visited StackOverflow for about 82 days in a row (starting January 21st), including yesterday (April 13th) and today (April 14th).
All times UTC of course (I thought that was clear but I've now added it to my question as a relevant info).
All visits are in a logged-in session of course.
I've just discovered that SO didn't "see" the April 13th visit, so my consecutive days visits were zeroed !!
It's a bug for sure. I have open tabs which my browser's history shows that are from April 13th. More than 20 of them. I saw this one: Consecutive Days bug/glitch , and it's clearly what happened to me. Please help! I'm so close to get the Fanatic badge...