Crash seemingly related to Fake IP feature

[SDGNelson]

We've received reports from several hosts of Unturned (AppID 304930) that their servers intermittently crash if Fake IP is enabled. Here's a crash dump from a Windows server which reports the crash happening in steamclient64.dll:

Unturned.exe.23712.dmp

I asked a couple of hosts running into the crash to enable verbose output from ISteamNetworkingUtils::SetDebugOutputFunction. The log files are hundreds of thousands of lines, so I've cut out the last hundred or so before the crashes here:

SteamNetworkingSockets Log 1.txt
SteamNetworkingSockets Log 2.txt

The frequency of the "we didn't know about a session on that relay for this connection" messages seems to increase gradually while the server is running.

Any help you can provide would be greatly appreciated! I'm not sure whether this is a bug on my end or not.

[RBMKBlaze]

After this it just stops without exiting and basically kills the game.