The monitor and Bluetooth problems are very reminiscent of another Apple problem. Remember this one? In 2015 I bought an ipad air 32gb with iOS 8.4.1, but it had major problems getting and keeping a wifi connection. Apple support was useless. They kept telling me that I was the only person in the world who had ever reported a problem. I did some searching and discovered this had been an ongoing problem since iOS 8 and it continued with iOS 9. Has it ever been fixed? I sent the ipad back.My complaint with Apple is that they do a really bad job of communicating with users about not just this specific issue, but bugs in general. A public bug database where people could see at least some of the comments made by their engineers would do wonders - it would let us know whether they're aware of a given problem, what they're able to do to fix it, and when and in what form relief will come. One of the bad legacies of Steve Jobs is that under his guidance Apple became super obsessed with secrecy. They don't want to do anything which might tip people off to future plans, and public bug databases are one of the ways for such information to leak, so Apple does far less of that kind of thing than other companies.
Apple iOS 8.4 Hit By Return Of Crippling Bug
http://www.forbes.com/sites/gordonkelly/2015/07/24/apple-ios-8-4-old-foe/
Welcome to the nightmare Apple can’t wake up from. After promising to fix the functionality stripped from iOS 8.4 in iOS 9, Apple’s iPhone, iPad and iPod touch software has now been hit by an old foe…
WiFried is back with a vengeance. The bug makes any form of Internet access a nightmare by repeatedly dropping WiFi connections and slowing speeds to a crawl and Apple Support Communities has now started receiving WiFried complaints from frustrated users running iOS 8.4.
Apple iOS 8.4.1: Should You Upgrade?
http://www.forbes.com/sites/gordonkelly/2015/08/20/apple-ios-8-4-1-should-you-upgrade/
iOS 8 has a notorious history for troubled WiFi, but those who hadn’t experienced previous issues are now finding iOS 8.4.1 is causing new problems.
WiFried: iOS 8 WiFi Issue
https://medium.com/@mariociabarra/wifried-ios-8-wifi-performance-issues-3029a164ce94#.51yu8i51y
Apple customers report devices crashing on iOS 9 update
https://ca.news.yahoo.com/apple-customers-report-devices-crashing-ios-9-112600600–finance.html
iOS 9 users reporting Wi-Fi connectivity problems
http://www.ibtimes.co.uk/ios-9-users-reporting-wi-fi-connectivity-problems-how-fix-them-1520656
iOS 9 brings its own share of inherent bugs and post-update issues such as persistent Wi-Fi connectivity problems like any other major iOS update. Some of the recently reported issues include inability to connect to a Wi-Fi network, unexpected error messages with incorrect password entries, intermittent connection issues and/or extremely slow connection speeds.
Broken Wi-Fi in iOS 9
http://www.gottabemobile.com/2015/10/22/ios-9-problems-fixes/
We’re already seeing complaints about broken Wi-Fi in iOS 9. This isn’t at all surprising given that Wi-Fi problems are among the most common iOS problems.
Apple customers report devices crashing on iOS 9 update
https://ca.news.yahoo.com/apple-customers-report-devices-crashing-ios-9-112600600–finance.html
Apple Releases iOS 9, Update Failures Anger Users
http://www.forbes.com/sites/gordonkelly/2015/09/16/apple-releases-ios-9/