An example 'global search' on my machine:
- Screen Shot 2018-09-19 at 5.15.33 PM.png (133.11 KiB) Viewed 263 times
Could you see if this submenu is set to Show All in your machine and try searching again?
Both the normal listing and the search results are filtered based on this submenu's setting.
- Screen Shot 2018-09-19 at 5.16.20 PM.png (24.16 KiB) Viewed 263 times
If you still face an issue, could you perhaps post a phone video of what you're facing?