### ImageMagick version

7.1.1-29

### Operating system

MacOS

### Operating system, version and so on

13.6.6

### Description

The -separate switch no longer reliably outputs only channel images (for TIFFs with embedded PSDs at least)

### Steps to Reproduce

magick -define psd:alpha-unblend=off -define colorspace:auto-grayscale=false 609205.tif -separate -channel ALL channels.cha%d.png

or

magick -define psd:alpha-unblend=off -define colorspace:auto-grayscale=false 609205.tif -separate channels.cha%d.png

### Images

[609205.tif.zip](https://github.com/ImageMagick/ImageMagick/files/14923258/609205.tif.zip)

-separate no longer outputting only channels
This is a GitHub Issue
repo:ImageMagick
owner:ImageMagick
Title : -separate no longer outputting only channels
Issue date:

--- start body ---
### ImageMagick version

7.1.1-29

### Operating system

MacOS

### Operating system, version and so on

13.6.6

### Description

The -separate switch no longer reliably outputs only channel images (for TIFFs with embedded PSDs at least)

### Steps to Reproduce

magick -define psd:alpha-unblend=off -define colorspace:auto-grayscale=false 609205.tif -separate -channel ALL channels.cha%d.png

or

magick -define psd:alpha-unblend=off -define colorspace:auto-grayscale=false 609205.tif -separate channels.cha%d.png

### Images

[609205.tif.zip](https://github.com/ImageMagick/ImageMagick/files/14923258/609205.tif.zip)

--- end body ---
