Spring data rest mongo adding entry to empty Reference fails

Mongo DB entity:

@Document
public class Person {
  @Id
  private ObjectId id;
  @DBRef
  private List<Account> accounts;
}

When using POST + uri to add an account:

java.lang.NullPointerException: Cannot invoke "java.util.Collection.add(Object)" because "collection" is null
	at org.springframework.data.rest.webmvc.RepositoryPropertyReferenceController.lambda$createPropertyReference$10(RepositoryPropertyReferenceController.java:269) ~[spring-data-rest-webmvc-3.3.4.RELEASE.jar:3.3.4.RELEASE]
	at org.springframework.data.rest.webmvc.RepositoryPropertyReferenceController.lambda$doWithReferencedProperty$18(RepositoryPropertyReferenceController.java:403) ~[spring-data-rest-webmvc-3.3.4.RELEASE.jar:3.3.4.RELEASE]
	at java.base/java.util.Optional.map(Optional.java:258) ~[na:na]

https://github.com/spring-projects/spring-data-rest/blob/4c35f36598aaf35f5c70b6d7f70b90c8a9b75925/spring-data-rest-webmvc/src/main/java/org/springframework/data/rest/webmvc/RepositoryPropertyReferenceController.java#L268

Happens because accounts is null.

In my opionion: Instead should create a new collection if previous value was null.
https://github.com/spring-projects/spring-data-rest/blob/4c35f36598aaf35f5c70b6d7f70b90c8a9b75925/spring-data-rest-webmvc/src/main/java/org/springframework/data/rest/webmvc/RepositoryPropertyReferenceController.java#L262
https://github.com/spring-projects/spring-data-rest/blob/4c35f36598aaf35f5c70b6d7f70b90c8a9b75925/spring-data-rest-webmvc/src/main/java/org/springframework/data/rest/webmvc/RepositoryPropertyReferenceController.java#L263
Maybe something like:

AUGMENTING_METHODS.contains(requestMethod) && prop.propertyValue != null ? (Collection<Object>) prop.propertyValue : CollectionFactory.createCollection(propertyType, 0);