Can't save validation rule with `{this}` in it

[edalzell]

Bug description

I was trying to set a field (time picker) to throw a validation error if it was before another time field. As per the docs I entered after:{this}.start_time and clicked saved. I got the Saved toast but the rule wasn't actually saved to the fieldset.

How to reproduce

In a fieldset that it's imported into a blueprint:

• add start_time as a time field
• add end_time as a time field
• enter after:{this}.start_time in the end_time`'s validation
• click save

Logs

Environment

Environment
Laravel Version: 12.62.0
PHP Version: 8.5.7
Composer Version: 2.10.1
Environment: local
Debug Mode: ENABLED
Maintenance Mode: OFF
Timezone: UTC
Locale: en_US

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

Storage
public/storage: NOT LINKED

Statamic
Addons: 1
License Key: Not set
Sites: 2 (Statamic, Arabic)
Stache Watcher: Enabled (auto)
Static Caching: Disabled
Version: 6.21.0 PRO

Statamic Addons
transformstudios/events: dev-161-isrecurring-does-not-include-every

Installation

Fresh statamic/statamic site via CLI

Additional details

No response

[duncanmcclean]

Out of curiosity, does it work if you press "enter" while focused in the input?