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Safari freezes when opening tab in background

Using iPhone 6s and iOS 9.0.2 (restored from a 5s).

Safari freezes when opening tab in background. After force quitting and relaunching the app i can switch to the tab.

Happens several times a day with different websites.

Does anyone else have this problem?

iPhone 6s, iOS 9.0.2

Posted on Oct 7, 2015 2:00 PM

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Posted on Dec 4, 2015 11:26 PM

My brand new unlocked, purchased from an Apple retail store just 2 weeks ago, iPhone 6S Plus 128GB in Space Grey with the Samsung CPU (#CPUGATE ?) has this very persistent issue. I have opened a case with Apple Support and was directed to an Apple store. I was able to demonstrate the issue to an Apple Genius within 2 minutes and the Apple Genius said they would submit this issue to Engineering. We ran a diagnostic after Safari stopped responding to gestures and touch.


This is what I learned about the issue effecting the iPhone 6S Plus 128GB:


Devices Tested:

  • No Issue: iPhone 5 16 GB, iPhone 5S 16GB, iPad Mini with LTE, MacBook Air, MacBook Pro
  • Issue Exists: iPhone 6S Plus 128GB


Persistence:

This issue occurs even after wiping the iPhone, reinstalling the IOS from iTunes, setting up the iPhone as new, not restoring from a backup, and not signing in to iCloud or iMessage/Facetime/keychain/etc.


Observations:

Normally when opening a new background tab an animation runs showing an icon bouncing up mid-screen-hight and going into the "View Tabs" square (the first button on the right side of the screen); however, when this issue occurs the animation changes so that the icon does not bounce but the icon goes all the way up and to the left of the screen. Once this happens Safari will stop responding to gestures and touch.


Safari does not seem to crash, stop responding, or use a lot of CPU (load) when the issue occurs; however, Safari stops responding to gestures and touch. One can change from portrait to landscape just fine. One can change to other applications using the Home button.


The issue doesn't seem to be load or memory-useage related as the issue can occur with many tabs open (40+) or only a few tabs (3); with many apps open (15) or only Safari (1). The most annoying is when I open two tabs, have no other apps open, when Safari stops responding to gestures and touch.


Safari seems to close normally.


Steps to Reproduce:

  1. Go into the Safari's settings and change from "open links in the foreground" to "open links in the background".
  2. Enable private browsing mode (I only use Safari in Private mode).
  3. Hold the iPhone normally - portrait orientation
  4. Google (I searched "iphone freezes") and open a dozen tabs.
  5. Read a few tabs. Go back to the search and open a few more.
  6. Close a few tabs.

Perform the above steps 4 ~ 6 few times and the issue will occur; Safari may seem to work just fine here and there but out of nowhere Safari stops responding to gestures and touch. This happens 5 ~ 8 times when I'm searching for some information on something new or interesting.


Not Tested:

I have not tried using the default "open links in the foreground" setting as Safari to not useful to me when used this way. Nor was this tried without Private mode enabled, or in the landscape orientation.

34 replies

Mar 28, 2016 10:30 AM in response to welfon

Having same issue over here. I discovered it since iOS 9. The only workaround is to use the "Open In The Foreground." The issue still exist in 9.2 and also now the latest 9.3. Wonder why not Apple try to look into or reproduce the issue since we have written down. I can always reproduce the issue within few minutes. Knowing there's an issue but not fixing it is careless. The is a basic feature. Before obsess with details, first deal with the basic. Opening link in the background is a basic standard option.

Apr 24, 2016 12:11 AM in response to luka...

I first noticed this with my first iPhone 6 Plus purchssed in December of 2014. I've since had my 6 Plus replaced two times and experienced it with both. I've tested this on my SE and now my 6s and it is still a problem. I estimate it happens 1/4 links. Very interesting to see someone else has the speak screen function on. I turned this off and was able to open approximately 100 links in background without a single instance. i will continue to monitor but it looks like this either solves or at the very least dramatically reduces the problem.

Safari freezes when opening tab in background

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