Conditionally disabling fields do not immediately update disability status

Describe the Bug

I want to conditionally disable updates a collection field, based on the value set on another field. I've read this: https://payloadcms.com/community-help/discord/make-field-readonly-conditionally.

Unfortunately, this doesn't disable the fields immediately when I change the value of another field. Only after saving the page, it shows the desired result. Alternatively, I could use admin.condition, but I want the user to still read the value of the field, but unable to update it.

Link to the code that reproduces this issue

https://github.com/chrisvanmook/payload/tree/repro/conditional-disable-fields

Reproduction Steps

1. Create a post
2. Enter a value (except "test") as title (this should make the description field unable to update)
3. Note nothing happens to the description field
4. Save
5. Now the field is disabled / unable to update
6. Now try enabling it by entering "test" in the title field
7. Note nothing happens to the description field
8. Save
9. Note nothing happens to the description field
10. Hard refresh
11. Now the description field is enabled

Which area(s) are affected? (Select all that apply)

area: ui, area: core, Not sure

Environment Info

WARN  The "workspaces" field in package.json is not supported by pnpm. Create a "pnpm-workspace.yaml" file instead.

Binaries:
  Node: 23.11.0
  npm: 10.9.2
  Yarn: N/A
  pnpm: 9.9.0
Relevant Packages:
  next: 15.3.2
  payload: 3.42.0
  @payloadcms/db-postgres: 3.42.0
  @payloadcms/live-preview-react: 3.42.0
  react: 19.1.0
  react-dom: 19.1.0
Operating System:
  Platform: darwin
  Arch: arm64
  Version: Darwin Kernel Version 24.5.0: Tue Apr 22 19:54:49 PDT 2025; root:xnu-11417.121.6~2/RELEASE_ARM64_T6000
  Available memory (MB): 32768
  Available CPU cores: 10

Start from the conditional-disable reproduction branch linked in the issue and trace how the title field's value reaches the description field. Reproduce the behavior in the admin UI, then verify that changing the title immediately disables and re-enables the description without saving or refreshing, while preserving its readable value.