onSubmit validation skips untouched fields when some fields have onBlur validation

Describe the bug

When using TanStack Form with onBlur validation on all individual fields and onSubmit for the entire form, the onSubmit validation only validates fields that have been "touched" (focused/blurred). Fields that haven't been interacted with are skipped during form submission validation, even though they should be validated.

Your minimal, reproducible example

https://stackblitz.com/edit/vitejs-vite-sviy39k3?file=src%2FApp.tsx

Steps to reproduce

1. Focus and blur the "First Name" field (leave it empty)
2. Leave the "Last Name" and "Email" fields completely untouched
3. Click "Submit Form"
4. Notice that only First Name shows an error, but Last Name and Email don't

Note: If you submit without blurring any fields, all fields are correctly validated and show errors.

Expected behavior

All fields should be validated on form submission, regardless of whether they have been touched or not. The onSubmit validation should validate the entire form schema, not just the "dirty" fields.

How often does this bug happen?

Every time

Screenshots or Videos

No response

Platform

• OS: macOS 15.5
• Browser: Chrome
• Version: 138.0.7204.184

TanStack Form adapter

react-form

TanStack Form version

v1.15.2

TypeScript version

v5.9.2

Additional context

No response

リンクされた StackBlitz の再現を react-form アダプターで開始し、各フィールドで onBlur バリデーションを有効にした状態で、フォーム送信時のバリデーション動作を確認します。First Name だけがフォーカスを失った後に送信すると、操作していない Last Name と Email に対してもエラーが報告されることを確認し、同時に、すぐに送信した場合はすべてのフィールドがバリデーションされる動作を維持します。