Thermostat history preview not updating

I’ve seen a few posts where the thermostat card history view is not updating - this doesn’t exactly mimic my experience: The history preview you get under “History” is stale:

-but when you click “Show more”, it really does show more:

So the history is actually okay, it’s just the preview that’s stale. Anybody else experience this?

I was observing the exact same issue an hour ago. Now it works flawlessly again. But I rebooted my HA OS VM in between…