Date validation does not work correctly when using a fieldset within bard

[vintagesucks]

Bug description

When using a date validation such as before_or_equal:today in a fieldset within bard, the validation does not work as expected. If either no or any date value is provided, the validation fails with Must be a date before or equal to today..

This worked in Statamic 4, as shown in the screenshots and repositories below.

Statamic 4:

Statamic 5:

How to reproduce

Statamic 4 reproduction repo: https://github.com/vintagesucks/repro-statamic-4-date-validation (no issue)

Statamic 5 reproduction repo: https://github.com/vintagesucks/repro-statamic-5-date-validation

• Login to control panel (example@example.com / password)
• Open Home page
• Add New Set set
• Click Save & Publish

Logs

No response

Environment

Application Name: Statamic
Laravel Version: 11.30.0
PHP Version: 8.3.13
Composer Version: 2.7.7
Environment: local
Debug Mode: ENABLED
URL: localhost
Maintenance Mode: OFF
Timezone: UTC
Locale: en

Cache
Config: NOT CACHED
Events: NOT CACHED
Routes: NOT CACHED
Views: CACHED

Drivers
Broadcasting: log
Cache: file
Database: sqlite
Logs: stack / single
Mail: log
Queue: sync
Session: file

Statamic
Addons: 0
Sites: 1
Stache Watcher: Enabled (auto)
Static Caching: Disabled
Version: 5.37.0 Solo

Installation

Fresh statamic/statamic site via CLI

Additional details

No response