### ImageMagick version

 7.1.1-4

### Operating system

Windows

### Operating system, version and so on

Windows 11

### Description

I was using version  7.1.0-28 and I was able to extract the alpha channel from an image using: convert demo.tif -alpha extract extract.png

It worked perfectly on 7.1.0. The alpha channel was extracted. When I use the same command in 7.1.1-4 I get only a white image. 

### Steps to Reproduce

convert demo.tif -alpha extract extract.png

Extracts the alpha channel. extract.png is white but should contain the alpha channel image.

### Images

[demo.zip](https://github.com/ImageMagick/ImageMagick/files/11059385/demo.zip)

Alpha channel handling not working correctly
This is a GitHub Issue
repo:ImageMagick
owner:ImageMagick
Title : Alpha channel handling not working correctly
Issue date:

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### ImageMagick version

 7.1.1-4

### Operating system

Windows

### Operating system, version and so on

Windows 11

### Description

I was using version  7.1.0-28 and I was able to extract the alpha channel from an image using: convert demo.tif -alpha extract extract.png

It worked perfectly on 7.1.0. The alpha channel was extracted. When I use the same command in 7.1.1-4 I get only a white image. 

### Steps to Reproduce

convert demo.tif -alpha extract extract.png

Extracts the alpha channel. extract.png is white but should contain the alpha channel image.

### Images

[demo.zip](https://github.com/ImageMagick/ImageMagick/files/11059385/demo.zip)

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