If a specific skin is not being applied while others are working correctly, there are a few potential issues to consider. First, ensure that the skin name is correctly specified in your code and matches exactly with the name in the Spine project. You can verify this by checking the skin name in the Spine editor and comparing it with the name used in your code. Additionally, check if there are any warnings in the Spine editor when you open the project, as these might indicate issues with the skin setup. If the skin is present in the array but still not applying, it might be due to missing attachments or incorrect setup in the Spine project. You can also try setting the skin to null before applying the new skin to ensure that no previous skin settings are interfering.