Automation worked fine on my Apple Watch Series 3 (changing faces at 7:00 and 23:00; I use a “day face” and a “night face”), but I recently bought an Apple Watch Series 7 and started wearing both of them (the 7 is now my “day watch” and the 3 is still used as my “night watch”, though only for sleep tracking). Now it looks like the watch face only seems to change on the watch I’m wearing at 7:00/23:00 (while I would like to have it change on both, preferably even to different “day” watch faces).
(the workaround will be to not change faces, but only change watches…)
I’m pretty sure mine has changed whilst locked too.
I wonder if it’s something to do with the watch on your wrist getting set as the primary watch and the automation not working on the secondary watch?
I also think that this is down to Primary watches. I tried to use 2 watches in the past (Day watch and Night Watch) But it never worked consistently regarding Sleep or activity tracking.
I had a shortcut to change watch faces in the morning and at my nominal quitting time. It almost invariably required me to tap something; if I didn’t, or I missed the alert altogether, it didn’t change.
Then after the most recent watch update, it started going off (and asking me to confirm) every time I ran any shortcut, usually before the other shortcut ran.
Way too buggy to rely on, in my experience. Obviously other people have no problems.