On single file duplication connectors bind callback receives multiple files

[mungurs]

When single file is being duplicated bind callback returns multiple files with the same details (hash, name, phash..).
Is this a bug?

Array
(
    [added] => Array
        (
            [0] => Array
                (
                    [isowner] => 
                    [ts] => 1477381815
                    [mime] => image/png
                    [read] => 1
                    [write] => 1
                    [size] => 461751
                    [hash] => l1_QWRyaWFuX1ppbmdnICgxKSBjb3B5IDIucG5n
                    [name] => Adrian_Zingg (1) copy 2.png
                    [phash] => l1_XA
                    [tmb] => 1
                )
            [1] => Array
                (
                    [isowner] => 
                    [ts] => 1477381815
                    [mime] => image/png
                    [read] => 1
                    [write] => 1
                    [size] => 461751
                    [hash] => l1_QWRyaWFuX1ppbmdnICgxKSBjb3B5IDIucG5n
                    [name] => Adrian_Zingg (1) copy 2.png
                    [phash] => l1_XA
                    [tmb] => 1
                )

        )

    [changed] => Array
        (
            [0] => Array
                (
                    [isowner] => 
                    [ts] => 1480604981
                    [mime] => directory
                    [read] => 1
                    [write] => 1
                    [size] => 0
                    [hash] => l1_XA
                    [name] => files-manager
                    [rootRev] => 
                    [options] => Array
                        (
                            [path] => 
                            [url] => http://www.xxx.local/files/files-manager/
                            [tmbUrl] => http://www.xxx.local/files/files-manager/.tmb/
                            [disabled] => Array
                                (
                                    [0] => chmod
                                )

                            [separator] => \
                            [copyOverwrite] => 1
                            [uploadOverwrite] => 1
                            [uploadMaxSize] => 2147483647
                            [uploadMaxConn] => 3
                            [uploadMime] => Array
                                (
                                    [firstOrder] => deny
                                    [allow] => Array
                                        (
                                        )

                                    [deny] => Array
                                        (
                                        )

                                )

                            [dispInlineRegex] => ^(?:(?:image|text)|application/x-shockwave-flash$)
                            [jpgQuality] => 100
                            [archivers] => Array
                                (
                                    [create] => Array
                                        (
                                            [0] => application/x-tar
                                            [1] => application/x-gzip
                                            [2] => application/x-bzip2
                                            [3] => application/x-7z-compressed
                                            [4] => application/zip
                                        )

                                    [extract] => Array
                                        (
                                            [0] => application/x-tar
                                            [1] => application/x-gzip
                                            [2] => application/x-bzip2
                                            [3] => application/zip
                                            [4] => application/x-7z-compressed
                                        )

                                    [createext] => Array
                                        (
                                            [application/x-tar] => tar
                                            [application/x-gzip] => tgz
                                            [application/x-bzip2] => tbz
                                            [application/x-7z-compressed] => 7z
                                            [application/zip] => zip
                                        )

                                )

                            [uiCmdMap] => Array
                                (
                                )

                            [syncChkAsTs] => 1
                            [syncMinMs] => 10000
                            [i18nFolderName] => 0
                            [tmbCrop] => 1
                            [csscls] => elfinder-navbar-root-local
                        )

                    [volumeid] => l1_
                    [locked] => 1
                    [isroot] => 1
                    [phash] => 
                )

        )

)