Nautilus connection to SSH IPv6 address fails

[Eero Aaltonen]

After reading answer https://answers.launchpad.net/ubuntu/+question/151402

I have tested that
1) on the command line
"""
sftp 'USER@[IPv6_ADDR%INTERFACE]'
"""
connects successfully

, but
2) on the address field of nautilus 1:3.26.4-0~ubuntu18.04.5, both protocols 'ssh' and 'sftp' result in "Connection failed" for the same form of address.

Expectation was for this connection to succeed.

$ lsb_release -rd
Description: Ubuntu 18.04.4 LTS
Release: 18.04

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: nautilus 1:3.26.4-0~ubuntu18.04.5
ProcVersionSignature: Ubuntu 4.15.0-106.107-generic 4.15.18
Uname: Linux 4.15.0-106-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.15
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Jun 25 16:52:53 2020
InstallationDate: Installed on 2018-01-10 (896 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
SourcePackage: nautilus
UpgradeStatus: Upgraded to bionic on 2019-02-12 (499 days ago)
usr_lib_nautilus:

[Sebastien Bacher (seb128)]

Thank you for your bug report, could you report it upstream on https://gitlab.gnome.org/GNOME/nautilus/issues/ ?

[Eero Aaltonen (ejn)]

Reported upstream as https://gitlab.gnome.org/GNOME/nautilus/-/issues/1539

[Andre Klapper (a9016009)]

@seb128: No, please do not ask folks to report issues upstream when this was only tested with software versions which are 30 months old. Upstream does not want such reports as long as issues have not been reproduced before in a recent and supported software version. Thanks.

[Sebastien Bacher (seb128)]

Thanks for reporting upstream and confirming it's still an issue with the current flatpak