Welcome to the Forum, @susiemac9! 
What sound are you trying to use for your Wyze app notifications? If it’s one of the app-provided sounds ( Account ➜ Notifications ➜ Push Notifications ➜ Notification Sound ➜ Wyze Sound {#}), then sometimes these can get hosed when the app updates. This experience apparently isn’t unique to the Wyze app and reportedly sometimes happens with other Android apps. The accepted solution seems to be uninstalling/reinstalling the app. For something like that, I generally like to uninstall the app, reboot my phone, reinstall the app, and reboot my phone again. The new installation of the Wyze app should pull down a fresh copy of your profile from your account once you sign in again.
Other things you may want to check on Android:
- The OS-level notification settings: long-press the Wyze app launcher, then select App info ➜ Notifications, then tap whichever channel shows the highest notification frequency and see what the settings are for that channel. Adjust as necessary.
- The battery usage settings: long-press the Wyze app launcher, then select App info ➜ App Battery Usage, then consider selecting Unrestricted. Making Notifications More Consistent / Reliable might provide some more context for this.
As I re-read your initial post, I’m curious about a few other things:
- Are you experiencing this (no sound with notifications) only on Window Cams?
- Do you use other Wyze Cams?
- If you use other Wyze Cams, then are those exhibiting the same notification behavior you’re seeing with Window Cams?
I want to make sure that I understand what you’re experiencing and that we’re addressing the right problem. In other words, I want to make sure that this really is an app problem and not a Cam problem.