Unexpected behaviour of ImageMagick when open gif file

[Urozhaeva]

ImageMagick version

6.9.12-93

Operating system

Linux

Operating system, version and so on

ALT Workstation 10.1, ALT Server 10.1

Description

According to the ImageMagick's documentation, application works with gif format:
GIF CompuServe Graphics Interchange Format 8-bit RGB PseudoColor with up to 256 palette entries. Specify the format GIF87 to write the older version 87a of the format. Use -transparent-color to specify the GIF transparent color (e.g. -transparent-color wheat).

But ImageMagick's bihaviour is different with different gif files

Steps to Reproduce

1. Open different gif files (without animation, with animation and with 3 colors, with animation and with 256 colors)

Results:

1. Gif file without animation is closed after several seconds
2. Gif file with animation and with 3 colors is closed after animation. The file is displayed correctly
3. Gif file with animation and with 256 colors is closed after animation. The file is displayed incorrect

Images

Gif files for reproducing:

[urban-warrior]

ImageMagick respects the GIF delay and loop meta data. Add -loop 0 to your command-line to loop continuously rather than exit.

[Urozhaeva]

I've added -loop 0 to my command line: $ display *.gif -loop 0 and $ display *.gif -loop 0 -delay 1
And it didn't help. ImageMagick closes after 1st loop. The same behaviour when you set any number for the loop.
I also tried to convert gif file: $ convert -loop 0 *.gif *_conv.gif but it didn't help too. ImageMagick closes after 1st loop.
Please note it correct converts gif file if you set number more than 1 for loop.

Please note I also have problems with displaying of gif file which contains 256 colors. Take a look at attachments
Incorrect_display_of _gif_file.tar.gz

[fmw42]

This works for me on IM 6.9.12-95 Q16 Mac OSX Ventura with your first animation above. Read the input before any settings or operators.

convert animation.gif -loop 0 x.gif