I have the same problem and for me from what I understand every time you take your watch off it locks. And when it locks your watch thinks you're not using it therefore no notifications will go through it. I even have this problem when I wear my watch loosely around my wrist if it's moving around and the sensors are not firm on your skin around your wrist it might think for a second it's off your wrist and lock. So basically for me every time I see a little lock symbol on the top of my watch The notifications don't come through, but when the lock symbal is gone then they come through. Now if your watch is snug around your wrist and you already unlocked your watch and the lock symbol won't go away put your watch in airplane mode for a few seconds, then take off airplane mode , then see if the lock symbol goes away and your notifications come through. By the way if you have nobody to help you by texting you to see if the notifications come through download the app called TextNow. It's a texting app that you could text yourself to see if the notifications will go through. But remember if your phone is on Your watch notifications won't go through ,so when you text yourself make sure as soon as you press send close the screen on your phone.