Upload on "FilesAdded" event fires twice

[avramovic]

The idea is to start upload the moment files are dropped on the upload zone. But, whenever I drop a file on the #plupload div, two requests are fired to /upload. I have tried to use a flag uploadStarted thinking my code is being executed twice, but no. The alert() was added to confirm code is run only once, which is the case, but I'm still getting two requests to /upload and the files are being uploaded twice. Using v3.1.0

Here's the code I'm using:

var uploadStarted = false;

var uploader = new plupload.Uploader({
    browse_button: 'plupload',
    url: '/upload',
    filters: {
        mime_types : [
            { title : "Photos", extensions : "jpg,png,gif" }
        ],
        max_file_size: '40mb',
        prevent_duplicates: true
    }
});

uploader.init();

uploader.bind('FilesAdded', function(up, files) {

    if (!uploadStarted) {
        uploadStarted = true;
        uploader.start();
        alert('upload started');
    }
});

[atgrrr]

Same problem here, i don't know how to solve it.

[avramovic]

This happens in Chrome on MacOS Sierra. In Safari, when I drop two files, first one gets uploaded twice and second once. When I drop three files, two files get uploaded twice and third once 😕

[avramovic]

Just to let you know, it works fine with v.2.3.1! Didn't know v.2.3.1 was the latest stable, I have used bower to install plupload and it automatically pulled v.3.1.0

[jayarjo]

v.3.1.0 is marked as pre-release (not ready for production). But it is an obvious bug.

[vlamirc]

Same problem here. I will wait for the final v.3.1.0.

[silverpresident]

Same problem. 3.0-beta1 works fine but 3.0.1 causes a double upload request for each file.
It happens even when chucked uploading is disabled.

[burzum]

Same issue here using 3.1.0, going back to another version.

[Bird87ZA]

Any idea on when this will be fixed? I have the same issue.

EDIT to add: 2.3.4 works fine here as well.