ShareDialog in automatic/shareSheet mode always triggers sharerDidCancel with Facebook app 558.0.0

[dl-music-iOS]

Checklist before submitting a bug report

• I've updated to the latest released version of the SDK
• I've searched for existing GitHub issues
• I've looked for existing answers on Stack Overflow, the Facebook Developer Community Forum and the Facebook Developers Group
• I've read the Code of Conduct
• This issue is not security related and can safely be disclosed publicly on GitHub

Xcode version

26.3

Facebook iOS SDK version

18.0.1, 18.0.3, and latest main branch (reproduced on all)

Dependency Manager

SPM

SDK Framework

Share

Goals

We want ShareDialog to work in .automatic mode and complete sharing successfully when the Facebook app is installed.

Expected results

When using ShareDialog with .automatic, sharing should complete successfully and call:

• sharer(_:didCompleteWithResults:) on success
• sharerDidCancel(_:) only when the user explicitly cancels

Actual results

With Facebook app version 558.0.0 installed, ShareDialog in .automatic mode consistently resolves to share sheet flow and ends with sharerDidCancel(_:).

Even though the Facebook app is installed, share completion callback is not received in this path.
No recent app-side logic changes were made before this started reproducing.

The same app behavior worked as expected with an older Facebook app version on the same device/setup.

Steps to reproduce

1. Install Facebook app 558.0.0 on device.
2. Use ShareDialog with .automatic mode.
3. Trigger share from app (same content/flow that previously worked).
4. Observe delegate callbacks.
5. sharerDidCancel(_:) is called consistently in share sheet path.
6. Replace with older Facebook app version and repeat: flow behaves as expected.

Code samples & details

// Current (problematic) usage
let dialog = ShareDialog(
    viewController: fbSDKDelegatableVC,
    content: content,
    delegate: fbSDKDelegatableVC
)
dialog.mode = .automatic
dialog.show()

Setting dialog.mode = .native works correctly in our environment, so we have applied the following workaround as a temporary mitigation:

// Workaround (works)
let dialog = ShareDialog(
    viewController: fbSDKDelegatableVC,
    content: content,
    delegate: fbSDKDelegatableVC
)
dialog.mode = if let fbURL = URL(string: "fb://"),
   UIApplication.shared.canOpenURL(fbURL) {
    .native
} else {
    .browser
}
dialog.show()

[panhongx]

Same here. Photo sharing is broken for Facebook app(558.0.0). Calling dialog.show() immediately triggers sharerDidCancel(). The workaround above only works for ShareLinkContent, but not for SharePhotoContent(). It can indeed open the Facebook app, but the photo is not included in the 'New Post' screen.

[yanjifa]

+1

[thanhnguyen-astraler]

+1

[akos989]

+1

[tomiska2004]

+1

[RushanB]

+1

[omersezer]

+1