Form prefill on failed submission loses submitted text value when default present

Bug present as of version: 2.24.7-SNAPSHOT

When a form submission fails, values in text fields should be preserved. They are indeed preserved, unless a text field has a default value specified.

So if I have:
Name: [ ]
Company: [ ]

and user submits a failed request of

Name: [Brett]
Company: [NewCo]

and that request fails, the form is restored as:

Name: [Brett]
Company: [NewCo]

But if my form starts as:

Name: [ ]
Company: [Adobe]

and user submits a failed request of

Name: [Brett]
Company: [NewCo]

the form is restored incorrectly as:

Name: [Brett]
Company: [Adobe]

Reproduce the failed form submission with a text field that has a default value, then trace the form prefill behavior responsible for restoring submitted values. Done means the submitted text value is retained after failure instead of being replaced by the default; the issue does not mention a specific file or test to run.

Written by the indexing model from the issue text.