Django Status 200 but 'Failed to Load Response Data" On Certain Image Uploads

I’m making an ajax post request to the Python Django view below which always return a success json response.

# views.py
@csrf_exempt
def success_response(request):
    """
    Returns a http response with a JSON success state
    :param request: 
    :return: 
    """
    return JsonResponse({'success': True})

In each ajax post request, i’m attaching an image file in enctype=multipart/form-data format. As you can see, here is an example request payload:

------WebKitFormBoundarymYCuLcqA6kEkqMA7
Content-Disposition: form-data; name="file"; filename="willprobablycrash.png"
Content-Type: image/png


------WebKitFormBoundarymYCuLcqA6kEkqMA7--

How is it possible that images below a certain image dimension (below 960px x 1141px) return the intended response {"success": true} while images above the said dimension return Failed to Load Response Data?

In both success and error cases, the status_code in the response is 200.