bug: canDismiss in ion-modal is trigger twice when backdrop is click

[5im0n]

Prerequisites

• I have read the Contributing Guidelines.
• I agree to follow the Code of Conduct.
• I have searched for existing issues that already report this problem, without success.

Ionic Framework Version

v8.x

Current Behavior

When attaching the canDismiss callback function to a modal, the function is correctly triggered when using the dismiss() function.

However, if we click on the modal backdrop to dismiss it, the canDismiss function is triggered twice.

This issue might be related to using the standalone API with provideIonicAngular(). In the documentation example which uses the module-based approach, this problem does not occur.

Additionally, this issue does not occur when dismissing the modal with the ESC key.

bug.mp4

Expected Behavior

The canDismiss callback function should only be triggered once, regardless of how the modal is dismissed (e.g., using dismiss(), clicking the backdrop, or pressing the ESC key).

The behavior should be consistent across all methods of dismissing the modal.

Steps to Reproduce

1. Set up a project using the standalone API with provideIonicAngular().
2. Attach a canDismiss callback function to a ion-modal.
3. Open the modal in large screen and attempt to dismiss it by click the backdrop:
4. Observe that canDismiss is triggered twice.
5. Use the ESC key: Observe that canDismiss is triggered only once (correct behavior).
6. Call the dismiss() function programmatically: Observe that canDismiss is triggered only once (correct behavior).

Code Reproduction URL

https://stackblitz.com/edit/angular-2ftmlj?file=src%2Fapp%2Fexample.component.ts

Ionic Info

Ionic:

Ionic CLI : 7.2.0

Utility:

cordova-res : not installed globally
native-run : not installed globally

System:

NodeJS : v22.5.1
npm : 10.8.2
OS : Windows 10

Additional Information

No response