First time yesterday I started to experience the notification issue with my S8 running 10.1
I would be receiving SMS messages yesterday morning but I’d say about 70% would refuse to notify via the watch ⌚️.
No Taptic feedback, no ding sound, no screen notification and no little red dot.
But when I’d go into messages via my watch the new message would be sitting there.
All of a sudden latter in the afternoon it began to work correctly again on its own.
Weird :/
See my post a few above... I was having seemingly random bouts of not receiving messages notifications, then inexplicably they'd start working again, then not. Turns out, in my case at least, it seems to be a bug related to being on WiFi (at least my home WiFi... have not yet tried it while on a network in a coffee shop or something). And again, this particular bug is not just with Messages notifications on the Watch... if I take the Watch off, the notifications do not correctly come in on the iPhone itself either (just appear on the lock screen... no sound/haptic).
I'm still trying to figure out exactly what reproduces the bug. In my "default" configuration, WiFi on and connected, and with WiFi Calling on, I get no messages notifications. If I disconnect from my WiFi network, those notifications will come in. Re-connect to WiFi and they stop again. I can do this over and over, very repeatable.
BUT... if I turn WiFi Calling off, that seems to trigger a condition where Messages notifications will not work, regardless of whether WiFi is connected or not. So, IOW, while WiFi being disconnected usually allows Messages notifications to come through, if WiFi Calling is also turned off, the notifications stop. Furthermore, doing this seems to put the iPhone/Watch in a "bad mood" where, even if I turn WiFi Calling back on (and wait for a bit to be sure it's activated), Messages notifications still don't work, even with WiFi disconnected.
After some time has passed (maybe an hour or so?), the prior behavior (where Messages notifications would come through when WiFi Calling was on but WiFi was disconnected) is restored.