Empty section remains visible when all inner fields are hidden via triggers

[SushC-OSU]

Winter CMS Build

1.2

PHP Version

8.1

Database engine

MySQL/MariaDB

Plugins installed

No response

Issue description

In backend forms, if a section has fields that are conditionally shown using YAML trigger, the section may remain expanded with no content when all its fields are hidden. This creates an empty panel section UI when switching away from the selected option that originally made the section visible.

Steps to replicate

1. Create a backend form with:

• A radio field (e.g., auth_type) to control the display
• A section (e.g., saml_advanced) with a trigger to show it when auth_type = saml
• Fields inside the section that also have their own trigger based on auth_type

2. Set auth_type = saml, section and fields appear correctly
3. Switch auth_type to something else, section header disappears, but an empty expanded
   remains

Expected Behavior:
The section should fully collapse (and hide) when all of its child fields are hidden.

Actual Behavior:
The section’s container remains visible and expanded, despite no visible fields inside it, resulting in a blank section with empty space.

Why This Happens:

• Section has its own trigger on auth_type.
• Each field inside the section also has independent triggers.
• So even if the section is hidden via filterFields() or YAML trigger, the child fields' triggers override or conflict.
• This causes the section content to remain expanded even when empty.

Screen.Recording.2025-08-04.at.16.58.18.mov

Workaround

No response

[apple-bears]

Hi @SushC-OSU ,

I'm trying to replicate the bug but I'm not sure about Fields inside the section that also have their own trigger based on auth_type.

Can you guide me how to replicate the bug? I have this for now.

    security_level:
        label: Access Level
        type: radio
        default: guests
        options:
            all: All
            registered: Registered only
            guests: Guests only
    user_details_section:
        label: User details
        type: section
        comment: This section contains details about the user.
        trigger:
            action: show
            field: security_level
            condition: value[all]