TYPO3 Core

If a BE user doesn't have access to a field in a localized record, this field gets the default value upon save instead of the parent record value.

Use case:
Default language is Italian and a BE user must only translate (edit) secondary language Spanish. We want to simplify the experience of this user so we only display the title (header) and text (bodytext) fields of tt_content. With this bug instead is mandatory to enable all fields in "Allowed excludefields".

Step to reproduce:
1. BE user can't edit tt_content.header_layout of a localized tt_content record because is not selected in "Allowed excludefields".
2. tt_content.header_layout value in parent record is 5.
3. BE user saves the localized tt_content record

Result:
Localized tt_content record have now value 2 (default value for header_layout) instead of parent record value 5.