Mine was the opposite. It stopping including any tweets I made after 3 July 2017 in my searches. It appeared to be still downloading them, just they were not included in searches. I think the bug was still present a few months ago. No idea if others were affected or just me.
I also saw a bug where it didn't include the end of tweets (possibly some sort of character limit). But that was pretty minor.
I also saw a bug where it didn't include the end of tweets (possibly some sort of character limit). But that was pretty minor.