"+" button missing when editing existing tags (cannot add new fields)

[arg0WAK]

Describe the Bug/Crash

When editing an audio file that already contains metadata, the "+" button for adding new tag fields is not visible.

Instead, only the "Save" button is shown in the edit screen.

Steps to reproduce:

1. Open an audio file that already has metadata (e.g., Title, Artist)
2. Enter edit mode
3. Try to add a new metadata field

Actual behavior:

• The "+" button is not visible
• Only the "Save" button is shown
• There is no way to add new tag fields from this screen

Describe the intended behavior

The "+" button should always be visible in edit mode.

Users should be able to add new metadata fields (such as Album, Genre, Comment) even if the file already contains existing tags.

What android version do you use?

Android 16

What device model do you use?

Redmi Note 14 4G (HyperOS 3 Android 16)
Windows Subsystem for Android (WSA Android 13)

Bug report

This appears to be a UI state issue.

The "+" button is visible when editing files without metadata, but disappears when metadata already exists.

Editing existing fields works correctly, but adding new ones is not possible due to the missing button.

This might be related to layout visibility, conditional rendering, or a state handling issue in the edit screen.

Duplicates

• I have checked this issue for duplicates.
• I have checked that this issue occurs on the lastest version.