UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3046.0 Safari/537.36

Steps to reproduce the problem:
Here is what I did to encounter this problem. It occurs very frequently for me.

1. Go to global search
2. Search for "#match" and it works correctly, finds hits in 176 files
3. Turn on regular expression search and search for "#match" now it finds hits in 175 files. It misses matches in a file that was recently updated from git.
4. Try search for "#match, file:design/2.json" without regexp on... and it finds all the matches.
5. Try search for "#match, file:design/2.json" with regexp on... and NO MATCHES

What is the expected behavior?
I would expect that it can find matches in all the files with regexp turned on and off.

What went wrong?
Regular expression search is not finding matches in all files.

Did this work before? No 

Chrome version: 59.0.3046.0  Channel: canary
OS Version: 10.0
Flash Version: 

This has happened for me ever since I started using dev tools a couple of years ago... or at least since I remember the regular expression global search being around.

I suspect it has something to do with files being updated on git, and not being reindexed correctly.