HomeKit No Response, Multiple Items

Last night, suddenly, many items in my Home app are labeled as unresponsive. They are all Lutron (I have Caseta in-wall switches). That is, most of my Scenes were failing and many items were being shown an unresponsive (but not all). For some, I could just turn them on individually. I reset the Lutron hub, re-registered it, no change.

I can use the Lutron app, no problem.

I'm trying to figure out where the issue is. I have other lights (ie: Hue) that are fine, but they are not included in a "scene" (I use their app for that).

I didn't otherwise change anything, it just happened out of nowhere.

I have been using my new AppleTV 4K as the HomeKit hub.