Issues I'm still experiencing (even after hard reset) so far in ios10 public beta on iPhone 6s Plus...
- Music, podcast, or any audio randomly stops/pauses while playing (on solid wifi connection)
- iPhone becomes stuck in landscape mode and doesn't auto-rotate back to vertical position. Had to restart phone and turn on auto rotate lock to prevent it from happening.
- Cannot record and send video directly within iMessage. The option to send doesn't work upon touching it; you have to touch "cancel" to get out of that video screen.
- Stock widgets have remained blank without any content showing.
- While having headphones connected into headphone jack, if I toggle the "ring/silent" switch to silent mode, the headphones still continue playing audio.
- Cannot play videos in landscape mode (with auto-rotate lock off) within the Facebook app.
- And last but not least, obviously and expectedly, the battery life sucks tremendously.
So far I'm enjoying the new features. Just needs to be polished and once everything is running smoothly, it'll be amazing. I plan on keeping the public beta until the next update to see if that improves any of these issues. If not, then it's back to iOS 9.3.