URLSession fails with -1009 on physical iPhone 16 Pro Max running iOS 27 beta, works in Simulator

I’m building a SwiftUI app that fetches public JSON data using URLSession.shared.

The request works correctly in the iPhone 17 Pro Max Simulator, but fails on my physical iPhone 16 Pro Max running iOS 27 beta.

Endpoint: https://api.jolpi.ca/ergast/f1/2026/driverstandings.json?limit=100

Error:

NSURLErrorDomain Code=-1009 “The Internet connection appears to be offline.”

NWPath: unsatisfied (Denied over Wi-Fi interface) Resolved 0 endpoints in 1ms

The device can access the endpoint through Safari, and the same request works in Simulator. VPN, cellular permissions, Wi-Fi changes, and ATS settings have been checked.

Could this be an iOS 27 beta networking regression affecting URLSession on physical devices? Are there recommended workarounds or diagnostics?

Answered by DTS Engineer in 907198022

Sorry about the long delay responding; it’s been a bit hectic around here (-:

Do you still see this problem on the final release of iOS 27?

Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

Accepted Answer

Sorry about the long delay responding; it’s been a bit hectic around here (-:

Do you still see this problem on the final release of iOS 27?

Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

URLSession fails with -1009 on physical iPhone 16 Pro Max running iOS 27 beta, works in Simulator
 
 
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