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

Inizia con la riproduzione StackBlitz collegata usando l’adattatore react-form e segui il comportamento della validazione all’invio del modulo con la validazione onBlur abilitata su ogni campo. Verifica che l’invio dopo che solo First Name ha perso il focus segnali errori anche per Last Name e Email, che non sono stati toccati, preservando al contempo il comportamento per cui l’invio immediato convalida tutti i campi.