bug:ion-backdrop stays visible regardless of visible input

### Describe the Bug

ion-backdrop covers entire page and doesn't hide when [visible]="false"

### Expected Behavior

backdrop should hide when visible is set to false

### Steps to Reproduce

1. Open the link for the stackblitz for the basic example of ion-backdrop: https://ionicframework.com/docs/api/backdrop
2. change `[visible]="true"` to `[visible]="false"`
3. backdrop does not disappear

### Screenshots

### Operating System

MacOS

### Browser

Chrome

### Version

141.0.7390.66 (Official Build) (arm64)

### Additional Information

_No response_