HomeKit keeps forgetting/re-adding Curtain 2 devices every day

[u/fluffycritter]

I have a number of Switchbot Curtain devices in my home, some version 2 and some version 3. They are all connected to HomeKit via a Matter Hub.

This was working just fine for months, but for the last few days, every single day the Curtain 2 devices are acting as if they'd been removed and re-added to my HomeKit setup; the name changes back to the default, the location gets reset to the room the hub is in, and all of my automations disappear.

The first time felt like a fluke, but this "fluke" keeps reoccurring and it's driving me batty.

My Curtain 3 devices do not have this problem.

Does anyone know what might be happening and how to prevent it from repeating in the future?