Reliability of "name-of-threatid" in threat log searches

[apackard]

When using the "name-of-threatid" to search threat logs I am getting very inconsistent results.

Some signatures are returning properly, while others return blank results - even when I build the search syntax dynamically by clicking on the alerts in the results pane i.e. perform an unfiltered search, click on an alert name so it adds it to the search bar (name of threatid eq 'xxx'), run the search and it comes back blank when it obviously shouldn't be.

It appears as if some signatures simply aren't being parsed properly (but searching based on their numeric threatid works fine).

Is this a known bug, or something that can be fixed, or an indicator that we may have a corruption?

Thanks

[apackard]

..I should add that this is in Panorama - it does not seem to impact searching on a device itself.