Greedy NSProgressIndicator Allocation - objective-c

Question

I'm using a bunch of NSProgressIndicators at once (32 to be exact) and it looks like when they're animating they start allocating memory like no one's business
I've got reports that the app will slowdown and eventually crash after days of uptime, and this looks like the most likely culprit, but it's hard to pinpoint bugs that take days to appear.
I simply comment out the call to start animating, all memory behaves as expected. Could this be a result of multiple NSProgressIndicators alloc'ed on the same thread? or maybe sandboxing? All of the constant allocations are coming from Core Animation threads, I don't know what else could be going on.
Custom NSView that the progress indicator lives in
#interface MyView ()
#property (nonatomic, strong) NSImageView *imageView;
#property (nonatomic, strong) NSTextView *numberTxt;
#property (nonatomic, strong) NSProgressIndicator *progress;
#end
#implementation MyView
- (id)initWithFrame:(NSRect)frameRect {
self = [super initWithFrame:frameRect];
if (self) {
// Image
NSImage *image = [NSImage imageNamed:#"bg.png"];
CGRect rect = CGRectMake(0, 0, image.size.width, image.size.height);
self.imageView = [[NSImageView alloc] initWithFrame:NSRectFromCGRect(rect)];
self.imageView.image = image;
[self addSubview:self.imageView];
// Number
CGRect numberRect = CGRectMake(0, 30, image.size.width, 40);
self.numberTxt = [[NSTextView alloc] initWithFrame:NSRectFromCGRect(numberRect)];
[self.numberTxt setBackgroundColor:[NSColor clearColor]];
[self.numberTxt setEditable:NO];
[self.numberTxt setFont:[NSFont systemFontOfSize:30]];
[self.numberTxt setTextColor:[NSColor redColor]];
[self addSubview:self.numberTxt];
// Progress
CGRect progressRect = CGRectMake(self.frame.size.width * 0.5 - 20, self.frame.size.height * 0.5 - 20, 40, 40);
self.progress = [[NSProgressIndicator alloc] initWithFrame:NSRectFromCGRect(progressRect)];
[self.progress setStyle:NSProgressIndicatorSpinningStyle];
//This line, when commented, fixes things
[self.progress startAnimation:self];
//
[self addSubview:self.progress];
}
return self;
}