Issue with Amazon S3

I set up remote storage to be working with Amazon S3. But it works only like this:

- user uploads picture in the stream,
- folder is created in local server media/com_easysocial/photos/....
- images like _thumbnail.jpg _original.jpg _square.jpg _large _stock are created in local server. In amazon S3 bucket appears NOTHING.
- I click on cron url http://mydomain/index.php?option=com_easysocial&cron=true&phrase=.key
- then all the mentioned files (_thumbnail _original _square _large) appears in amazon S3. In local server media/com_easysocial/photos/.... there is left only one file _stock.jpg

When I upload picture in jreviews, none of the folders is created in local server, file appears in amazon S3 bucket.

So is there something with my easysocial settings? Why it's not working without clicking on cron url. I would appreciate your help.