Custom plugin form gets submitted twice on click

[hdodov]

Describe the Bug

This appears to be a regression. When I upgraded from version 3.0.0-beta.119 to 3.2.1, the forms in my custom plugins started getting submitted twice when the submit button gets clicked. Here's a reproduction video:

Screen.Recording.2024-11-27.at.19.26.59.mov

Link to the code that reproduces this issue

https://github.com/hdodov/test-payload/tree/form-submitted-twice

Reproduction Steps

1. Clone the reproduction repo: https://github.com/hdodov/test-payload/tree/form-submitted-twice
2. pnpm docker to start the project
3. Open http://localhost:3000/admin/test-plugin
4. Write something in the field
5. Click "Submit!"
6. You'll see two alerts sent from the onSubmit handler

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

area: core

Environment Info

Binaries:
  Node: 20.17.0
  npm: 10.8.2
  Yarn: N/A
  pnpm: 9.9.0
Relevant Packages:
  payload: 3.2.1
  next: 15.0.3
  @payloadcms/db-mongodb: 3.2.1
  @payloadcms/email-nodemailer: 3.2.1
  @payloadcms/graphql: 3.2.1
  @payloadcms/next/utilities: 3.2.1
  @payloadcms/payload-cloud: 3.2.1
  @payloadcms/richtext-lexical: 3.2.1
  @payloadcms/translations: 3.2.1
  @payloadcms/ui/shared: 3.2.1
  react: 19.0.0-rc-65a56d0e-20241020
  react-dom: 19.0.0-rc-65a56d0e-20241020
Operating System:
  Platform: darwin
  Arch: x64
  Version: Darwin Kernel Version 23.6.0: Thu Sep 12 23:34:49 PDT 2024; root:xnu-10063.141.1.701.1~1/RELEASE_X86_64
  Available memory (MB): 32768
  Available CPU cores: 16

[jessrynkar]

Hi @hdodov sorry we didn't get you a response sooner - the double form submit issue has been resolved in a previous release, updating to latest v3.37.0 will fix this behavior. Thanks for raising this 🙌

[github-actions]

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