Game crashes when hosting game on a specific computer, no crash report

I have a game based on the shooter game example with SteamVR functionality. At this point I’m testing the packaged build over the internet, and the problem I’m running into is that my remote friend cannot successfully host a game without the game locking up. No crash report or dmp file is generated, it just freezes and windows checks for errors until it is declared dead. Based on where the logs end I am 95% sure this is caused by my custom ammo system, but due to the lack of crash report I have no real leads on what it may be. This bug is not present on any of my 3 computers, or in PIE, nor does it happen when I host a game and he joins me. As such, I’m pretty much stumped. My best guess is that something about his hardware (a new i7 CPU) is causing things to happen in a different order than they do on any of my systems.

What could be causing this and how should I proceed in debugging it?

Look for the log file the game generates? It can give you an idea of what was the last thing thatr was laoding when the crash happened?

 CompileFolder/WindowsNoEditor/ProjectName\Saved\Logs/Projectname.log

Did you rule out personal firewall issues (i.e. asking your remote friend to disable it if active)?