NSCFString Memory Leak caused by HasMany Relationship

Model Bundle

bundle.h

@interface Bundle : ARBase
    
@property(readwrite, assign) NSString *name, *ordering, *id;

@end

@interface Bundle (Accessors)
    -(NSArray *) sheets;
@end

bundle.m

# import "Bundle.h"

@implementation Bundle
@dynamic name, ordering, id;

+ (void)initialize
{
    [[self relationships] addObject:[ARRelationshipHasMany relationshipWithName:@"sheets"]];
}
@end

Model Sheet
sheet.h

@interface Sheet : ARBase
    @property(readwrite, assign) NSString *name, *id, *bundleId;
@end

sheet.m

# import "sheet.h"

@implementation Sheet
    @dynamic name, id, bundleId;
@end

===How to reproduce===

get all bundles [Bundle findAll]
Run instruments and select profile leaks. a lot of NSCFString objects show up in the leaks. If however we remove the has many relationships, the leaks disappear.