I had a similar issue to this. I was crashing about every 10 minutes (could have been a coincidence) in game only on the 64-bit client. Crash was not present on the 32 bit client.

The newest update fixed this issue entirely for me! Would you still like me to upload any files?

I just updated to the latest 0.61 EXP, (Nov. 3). The crashing issue is still there, however.
I have tried the "-olduilobby" and that seemed to work; no issue with that server browser.

Same issue here!

This happened to me twice so far on the newest EXP build within only 2 hours of playtime. First time was walking down the stairs in the barn at Staroye, the second time happened walking out of a garage at Guglovo.

Here are some more examples of this near Kamyshovo