Hi,

I have found a bug/bad practice regarding the refresh method. If nested relations have been loaded, calling refresh on the main model causes loss of the nested relations. The direct relations of the main model get refreshed, but without loading the nested relations. Clearly, if I was using nested relations and I call refresh, I would still want to have all the relations.

I have made a simple workaround for my use case (this is only for iterable relations):

$relations = [];
foreach($this->getRelations() as $relationName => $value) {
	if(is_iterable($value) && $value->count() > 0) {
		$nestedRelations = $value->first()->getRelations();

		if(count($nestedRelations) > 0) $relations[$relationName] = array_keys($nestedRelations);
	}
}

$this->refresh();

foreach($relations as $relation => $nestedRelations) {
	foreach($this->$relation as $relatedInstance) {
		$relatedInstance->load($nestedRelations);
	}
}

Illuminate/database version: v8.27.0