Charlie_C

Yes, I've encountered this issue in my large note too (about 11mb).  Also this is a table format note with lots of pdf attachments. 

Another issue is I don't see any highlighting in the pdf attachments although the texts being searched are in them . This worries me a lot, as I used to search texts within pdf attachments frequently. If this can't work properly, then these pdf attachments are useless to me.
 

All notes that are created or updated after Jun 01 show the same dates as follows:

But the in the note details, the dates are normal:

In the left pane, the dates are also normal under the notes :

I tried to reboot my mac or evernote, neither would work.