Can you let me know:

1. Your phone model :Mi5
2. Your Android Auto version - full 8 digits :2.5.728603
3. Your Waze version :4.28.0.1

Both of you are using the latest Android Auto and Waze - both of you are using ARM64 devices, so should use either 2.5.728603 or 2.5.728604 - so should be ok.

But since both of you are having problems - I'd recommend to:
1. Try to use the USB cable which came to your phone. Lower quality USB cables are known to cause issues with phones connecting to Android Auto (data connection issues). They have no problems in supplying power.
2. Try to flush cache for both Android Auto and Waze (Settings, Apps, Android Auto/Waze, Storage, Clear Cache, Clear Data). Uninstall Waze & Android Auto after flushing the Cache, and reinstall again.

Including the Clear Cache? What about Google Maps? Does it behave similarly to Waze too?

Don't see any problems with suddenly hang after driving a while on the bugs list though. Is it easily reproducible - as in after 10 minutes of driving or so etc?

That is not hang - just the satellite/gps is not updating - I assume that you can move the map around? Apparently there are cases where the power savings mode of the phone is interfering with Waze for AA.

You need to add Waze into the exemption list for the power saving modes

Not sure for Mi5 where is it located, but I found a thread where http://en.miui.com/thread-322811-1-1.html Dunno whether it's still applicable or not

Yup, if using Waze directly, it would not exhibit this behavior. Google Maps and Android Auto is automatically in the exemption list iinm. It's listed as one of the bugs in Waze for AA at the moment and due to the power management feature of the phones.

Unfortunately for some people, even after adding it into the exemption list, the behavior remains. Hope this will fix it for you, if not, you need to wait until Waze properly adds itself into the exemption list, or disable power saving totally.

Wow type r manual ,?