I was trying to call the method findAll(Pageable pageable) on a MongoRepository instance with the following pageable: Pageable.unpaged(sort)
When looking at the data i saw that the sort order was ignored completely.

After digging through the sources I think the issues lies in Query.java

public Query with(Pageable pageable) {

    if (pageable.isUnpaged()) {
        return this; // <--- Here the sort is being ignored
    }

    this.limit = pageable.toLimit();
    this.skip = pageable.getOffset();

    return with(pageable.getSort());
}

As a work around i use PageRequest.of(0, Integer.MAX_VALUE, sort) but would be nice if this could be changed as it's not something you would expect