Paragraph's field 'behavior_settings' causes an error while importing paragraphs. Importing serialized fields

While importing the content with paragraph fields I came across the error:

Drupal\Core\Entity\EntityStorageException: Placeholders must have a trailing [] if they are to be expanded with an array of values. in Drupal\Core\Entity\Sql\SqlContentEntityStorage->save() (line 783 of /var/www/html/web/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorage.php).

The error occurs either on importing a new paragraph (to replicate: create the content -> export -> delete the content -> import) or importing the paragraphs over existing ones.

The error is connected to 'behavior_settings' field which stores its values in a database as a serialized array. Unserialization happens in Drupal core - Drupal\serialization\Normalizer\PrimitiveDataNormalizer->normalize() explicitly unserialized such fields. Without the patch, it tries to save the array instead of a serialized string. The patch forces it to serialize the value before importing.