Trying to run a migration from the feature that defines it.

I have a got feature setup that defines a migration. This works very well and I can succesfully run the migration after installing the feature.

I would like to automatically run the migration when the feature is being installed. I wrote the following install file for it:

/**
 * Implements hook_install().
 */
function feature_front_install() {
  MigrationBase::registerMigration('FrontBlocks', 'FrontBlocks', array('class_name' => 'FrontBlocks'));
  MigrationBase::registerMigration('FrontPageItems', 'FrontPageItems', array('class_name' => 'FrontPageItems'));
  
  $migration = Migration::getInstance('FrontBlocks');
  $migration->processImport();

  $migration = Migration::getInstance('FrontPageItems');
  $migration->processImport();
}

/**
 * Implements hook_uninstall().
 */
function feature_front_uninstall() {
  $migration = Migration::getInstance('FrontBlocks');
  MigrationBase::deregisterMigration('FrontBlocks');
  
  $migration = Migration::getInstance('FrontPageItems');
  MigrationBase::deregisterMigration('FrontPageItems');
}

The install hook runs and starts the migration. But the problem is that only the title field for the imported nodes gets saved. All other fields are ignored.

When I then run a "drush mr FrontBlocks" and "drush mi FrontBlocks" all the fields are there.

What am I doing wrong here?