Help track the v2.7 crash!

[AfterShock]

We're struggling to reliably reproduce the crash in 2.7, and the .dmp files aren't showing a callstack for us to use.

If anyone can help us try to reproduce it, that would be great. If you get a random crash, could you please give us details, such as:

What server were you on?
What map were you playing?
How many people were on the server?
What class were you playing?
What were you doing at the time?
Any other information that might be relevant? (People joining / leaving the server, you pressing the scoreboard button? Any kill assist related stuff going on?)

Also it would be very useful if you know if there were any pyros active at the time of the crash. It could be something to do with their networking or effects.

Thanks!