Minecraft for Windows 10 (Bedrock) crashes to desktop 100% of the time on loading a single player offline world. Occurs on both my self-built PC and my Microsoft Surface tablet, so hardware is ruled out. 

However, Tablet does not crash when connected to other WiFi networks, and PC does not crash when connected to the internet through a VPN, suggesting the problem is with how the library ucrtbase.dll interacts with certain - not all - network configurations, even though it is attempting to load a non-networked World. Also worth pointing out that the latest version of Minecraft (PS4) does not crash while on the network, indicating the problem is localized to how the PC version interacts with this library, or a bug with the library itself.

// from Event Viewer
Faulting application name: Minecraft.Windows.exe, version: 1.16.200.2, time stamp: 0x5fc589ea
Faulting module name: ucrtbase.dll, version: 10.0.19041.546, time stamp: 0x43cbc11d
Exception code: 0xc0000409
Fault offset: 0x0000000000071218
Faulting process id: 0x1f08
Faulting application start time: 0x01d6dca2b179a7fb
Faulting application path: C:\Program Files\WindowsApps\Microsoft.MinecraftUWP_1.16.20002.0_x64__8wekyb3d8bbwe\Minecraft.Windows.exe
Faulting module path: C:\WINDOWS\System32\ucrtbase.dll
Report Id: 4229f85f-2419-4e3c-a195-d6c4e3b6ce58
Faulting package full name: Microsoft.MinecraftUWP_1.16.20002.0_x64__8wekyb3d8bbwe
Faulting package-relative application ID: App