We know about the current random crash issue. The issue is deep in UE4 that we have been working with Epic trying to solve it for the last 2 months.
The main issue with this crash is we cannot replicate it in house. Some people get afflicted by it really badly. Others never see it (unfortunately like us). From that data I have gathered, it seems to affect about 3% of Play Sessions.
Back in Early November, I did send out an email to all people who had bug reported it and provided an email address in the Bug report. Thanking them for reporting the issue, and explaining that we are working on it.
In the UE4 Open Beta Discussion Thread had also several back and forths with @Radializer who also gets this issue, building a specific version to try and log and pin point the issue.
I am working on the issue, I am also working on the rest of the game as well. And try to progress with the issue as we get more data on it.