sound cuts out

Hey, JoeDean.

Thanks for letting me know that you tried those steps. Since the issue persist, and only occurs with Facebook, the next step is to reach out to them directly.

Learn How to contact an app developer.

Take care. 

Hi, JoeDean.

Since it happens with multiple apps, the next step is to Contact - Official Apple Support.

Warmly.

Hey there, JoeDean. 

Welcome to the Apple Support Communities. It sounds like you are having intermittent sound issues while using Facebook. I’m happy to help point you in the right direction.

First, restart your iPhone: Restart your iPhone - Apple Support

Then, make sure your iOS is up-to-date: Update your iPhone, iPad, or iPod touch - Apple Support

Also, make sure your app is up-to-date: Update apps or use automatic downloads - Apple Support

Finally, work through the steps shown, here: If an app unexpectedly quits, stops responding, or won’t open - Apple Support

I hope this helps! If you have further questions, don’t hesitate to respond to this thread. 

All the best.