I am having the same issue. I noticed it first 11/11/19 morning as I left to work and didn’t get a notification opening/closing the door. Everything has been working perfectly for the last 2 months. I am sharing my wyze devices with my GF and she receives all the notifications normally.
Restarting app, logging out/in, restarting phone, clearing wyze app cache, clearing wyze app data and cache from system settings, removing app->restarting phone->reinstalling app, moving sensor bridge to another wyze camera, removing and readding one of my two sensors, trying sd maid (3rd party app) to fully remove anything left over when uninstalling an app, changing my android’s DNS, WIFI/LTE… I am out of ideas. I am technical but I am legit out of ideas and believe the issue is on Wyze’s side.
Please note I still get some Wyze Alerts, the ones that are sent when a video is uploaded to the cloud. They are on cool down and I only get those alerts if motion is detected 5 minutes after. But I don’t get constant motion alerts, so something is wrong. Not a single sensor alert, but I can open the app and open door, pull down from the top (refresh), close door, Refresh and see the status change from open -> closed.
Unlocked Samsung S10e Android 9