Having tested this again, it appears that Nautilus is indeed working as expected. I've tested this earlier twice and was sure that there was a bug. Sorry to bother you.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to nautilus in Ubuntu. https://bugs.launchpad.net/bugs/1876983 Title: Moving files in nautilus only copies them if "apply this action..." is checked Status in nautilus package in Ubuntu: Incomplete Bug description: If files from folder A are moved (CTRL+X, CTRL+V) to folder B which contains a file named the same as a file in A, selecting "Apply this action to all files and folders", when prompted about the conflict, and pressing skip will then only copy the files to the new location. No files actually get deleted from the previous location. (Ubuntu 20.04) (GNOME nautilus 3.36.1.1) ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: nautilus 1:3.36.1.1-1ubuntu2 ProcVersionSignature: Ubuntu 5.4.0-28.32-generic 5.4.30 Uname: Linux 5.4.0-28-generic x86_64 ApportVersion: 2.20.11-0ubuntu27 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Tue May 5 21:32:27 2020 GsettingsChanges: b'org.gnome.nautilus.compression' b'default-compression-format' b"'tar.xz'" b'org.gnome.nautilus.window-state' b'initial-size' b'(890, 544)' b'org.gnome.nautilus.preferences' b'show-create-link' b'true' b'org.gnome.nautilus.preferences' b'executable-text-activation' b"'ask'" b'org.gnome.nautilus.list-view' b'default-column-order' b"['name', 'size', 'type', 'owner', 'group', 'permissions', 'where', 'date_modified', 'date_modified_with_time', 'date_accessed', 'recency', 'starred', 'detailed_type']" InstallationDate: Installed on 2020-04-25 (10 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) SourcePackage: nautilus UpgradeStatus: No upgrade log present (probably fresh install) usr_lib_nautilus: To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/1876983/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

