It appears that the issue with sandbox testing is not a server specific issue as the problem is not affecting everyone. In order to investigate this issue, the iTunes Server engineers have asked that bug reports be submitted with more complete information, including a sysdiagnose archive from the device. Such device will show additional information about the problem which a ping cannot.
First, here are the instructions to capture the sysdiagnose archive - please log into the Apple Developer Bug Report Profiles and log web page - <https://developer.apple.com/bug-reporting/profiles-and-logs/>
If you do this on the test device using the Safari browser, you can install the profiles to the device directly from the web site.
Install the following profiles
1. “App Store/iTunes Store for iOS” profile
2. “sysdiagnose for iOS” profile.
After all profiles are installed, please restart the device.
Please review the instructions for triggering the sysdiagnose profile and how to use iTunes to download the archive file by syncing with the device.
Make sure you are familiar with triggering the sysdiagnose log, then perform the steps to replicate the problem. When the failure occurs, trigger the sysdiagnose profile, wait 5 minutes, then sync the device with iTunes and find the sysdiagnose archive file. While reproducing the problem please capture screenshots showing evidence of the connection failure.
To submit the bug report, please follow these instructions. Please use the Apple Developer Bug Report web page - http://bugreport.apple.com.
After logging in, select the Product “Other”.
Fill out the bug report form. In the description section -
make sure to include the application ID
add a sequence of steps that a new user will take to use the app to find the In-App Purchase item
describe the evidence provided by the app that a network failure occurred. If there is a delayed response, indicate the approximate delay time.
Please include the sysdiagnose archive as an attachment to the bug report.
If you have a TestFlight build of the sandbox version of the app, please send an invitation to “apps_test@icloud.com”. Please include the bug report number in the invitation so that the test engineer knows which bug report to associate with the invitation.
Thank you for your assistance with this matter.
rich kubota - rkubota@apple.com
developer technical support CoreOS/Hardware/MFI