Nautilus hangs when opening a password protected .7z file

[Jeroen]

Very simple scenario: On a fresh Ubuntu 18.04 installation (with Unity and pzip-full installed) I try to open a password protected .7z file (created in an older Ubuntu version). Nautilus starts flickering, CPU usage rises to 80% for minutes and Nautilus is not usable for a long time. Minimising doesn't work, however terminating does, where after CPU usage turns to normal.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: nautilus 1:3.26.3-0ubuntu4
ProcVersionSignature: Ubuntu 4.15.0-33.36-generic 4.15.18
Uname: Linux 4.15.0-33-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CurrentDesktop: Unity:Unity7:ubuntu
Date: Sat Sep 8 12:30:29 2018
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/nautilus
GsettingsChanges:
 b'org.gnome.nautilus.preferences' b'default-folder-viewer' b"'list-view'"
 b'org.gnome.nautilus.window-state' b'sidebar-width' b'196'
 b'org.gnome.nautilus.window-state' b'geometry' b"'890x540+226+183'"
 b'org.gnome.nautilus.list-view' b'default-zoom-level' b"'small'"
InstallationDate: Installed on 2018-09-01 (6 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
SourcePackage: nautilus
UpgradeStatus: No upgrade log present (probably fresh install)
usr_lib_nautilus: dropbox 2015.10.28

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.