I am updating in this thread as it was the first to report the screen dimming/going black issue on iOS.
According to Waze, this issue has been resolved with a server-side fix. No sure what they did, or if they just "turned something off" so the app won't try to do the pop-up spotlight or what. No details have been provided.
Hi. Apple iPhone 6+ running latest software. Two issues; * screen dims/goes to black after three mins * voice commands do not Lincoln with my Senna SM5 Bluetooth device on my helmet. I do occasionally get the 'WARNING' messages and today - after 75 miles of silence - it gave me directions when I was on a call to someone. Senna updated as is iphone.