[Cyberduck-trac] [Cyberduck] #10494: v6.8.1 FTP fails in transferring more than one file

[Cyberduck]

#10494: v6.8.1 FTP fails in transferring more than one file
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    Reporter:  Argonaut  |      Owner:
        Type:  defect    |     Status:  new
    Priority:  normal    |  Milestone:
   Component:  ftp       |    Version:  6.8.0
    Severity:  major     |   Keywords:
Architecture:  Intel     |   Platform:  macOS 10.13
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 I updated from v.6.6.0 to v6.8.1 today (using CyberDuck's built-in
 updater).  Since then, CyberDuck has reported a variety of errors when
 trying to upload or download more than one file with ftp.  The first file
 works but, the errors are shown when CyberDuck tries the second file and
 the download ceases.  Errors including:

 - Interoperability failure 425 No data connection.
 - Connection failed 425 No data connection.
 - Download [filename] failed. Read timed out. The connection attempt timed
 out.
 - Interoperability failure 200 TYPE is now 8-bit binary.

 This only occurs when trying to transfer more than one file.  There seems
 to be no disconnection and single file transfers work perfectly.  I
 downgraded to v6.6.0 and there have been no such problems.  Sorry I can't
 be more specific about which version introduced the issue – I can't find a
 way to DL old versions of Cyberduck.

 I am using Cyberduck on an Apple Mac Mini (mid 2011) running macOS
 10.13.6.  The FTP server is on a Topfield 7160 PVR.  The connection is
 over an ethernet cable.

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Ticket URL: <https://trac.cyberduck.io/ticket/10494>
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