how to stop online icloud mail from auto download all attachments

Hi!

Today, 10/21/2014 my iCloud in browsers started doing very strange thing.

All attachments in mails are now automatically downloaded when I just select email!

Does anybody know how to stop this extra bothering behavior?

Got tons of mails, have to browse them, search in them - for example, when I have 10 mail from same sender, all with pdf attachment with size 5MB, I have to click to all of those 10 mails and now - iCloud download all attachments! And when I have to switch between more mails more times, it download attachment every time I select mail with attachment.

This happens today for first time, never before faced to this, no updates, no settings change.

Thanks for advice.