Can't join singleplayer or multiplayer worlds under x86-64 emulation

On my new Surface Pro 11, I have to run the x86-64 version of the game, because there's no arm64 version.  That would be tolerable if the game at least worked under emulation, but it doesn't.

If I try to start a single-player world, almost every time I try, it sits there loading for what feels like 5 or 10 minutes, then gives up and tells me that it couldn't connect to the world, and I need to check my internet connection.  Remember, this is for a single-player world... even though it internally runs a server, that traffic should be over loopback, so why would my internet connection matter?

If I try to connect to my own dedicated server running on an x86-64 machine, I immediately get "Disconnected from Server"

I attached a pcap of all the traffic sent to and from the MAC address of the dedicated server.

Even some of the the public servers don't work, either...

Please don't just tell me to make a feature request... the officially sanctioned way of playing the game, which is by clicking "install" in the store, is giving me a version of the game that's just outright broken, regardless of the implementation detail of what instruction set it's built for.

In fact, even my x86-64 machine has been having similar trouble loading singleplayer worlds lately!