I suspect this is related. Lights Randomly Turn On
My problems started with sunset routines failing and progressed to all smart apps and scheduled routines, morning and night. And worse - apps like Let There Be Light activating hours after the triggering event.
My problems seem to have resolved themselves sometime yesterday. I opened a couple tickets as the issue evolved for me. I got a respone back on the initial ticket about sunset routines not working saying that ST is looking into the issue, but no response on the ticket I mention in the link above.
I have a hub v1 with about 50 “devices” including some virtual, cloud-to-cloud, z-wave, and zigbee.