I was able to reproduce it multiple times around the time the problem was first reported: Searching for "from:mtaibbi" resulted in 0 hits, while searching from

I was able to reproduce it multiple times around the time the problem was first reported: Searching for "from:mtaibbi" resulted in 0 hits, while searching from other accounts worked fine. There was also a number of threads here, where people observed the same thing. For example https://news.ycombinator.com/item?id=35504389 https://news.ycombinator.com/item?id=35504389 It now seems to be fixed, whatever the cause.