File Upload component Problem with Chrome

Hi,
I have just created Fileupload component. If I try to upload same file again with size >=800kb then it stops to work for chrome.
If I upload another file or refresh the page then it works. for the same file it stops after 5-6 attempt.

Also noticed same problem on below demo site. Tried to upload same excel with >=800kb size in sequence. After 5-6 times Its stopped to upload the file. Problem seems with chrome. it works with firerox
Unchecked the ‘Simulate slow server’ option for file upload
http://demo.vaadin.com/sampler#UploadWithProgressMonitoring

Thanks,
Bharat