Thumbs never updated after renaming a bunch of image files

I refuse to waste my time reporting this upstream, since Gnome developers (or at least Nautilus developers) have proven in several occasions to be a bunch of idiots unable to deal with bug reports (or with bugs in general). You deal with them.

I had a folder containing a bunch of image files, namely .png files, named 1.png, 2.png .... up to 100.png and more.

I deleted many of them and then renamed the remaining ones to 1.png through 21.png.

Now I look at the folder and all the thumbs have not been updated. For example, the thumb of say 5.png is the thumb of the image that used to be called 5.png before renaming.

Even hitting f5 does not rebuild the thumbs, and if I right-click on the folder I don't see any option in the context menu to manually force-rebuild the thumns (which shouldn't be necessary in the first place but should be something I'd be able to do).

It's obvious that renaming files should invalidate the thumbs cache. Fucking pathetic.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: nautilus 1:3.18.4.is.3.14.3-0ubuntu6
ProcVersionSignature: Ubuntu 4.4.0-173.203-generic 4.4.208
Uname: Linux 4.4.0-173-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia
ApportVersion: 2.20.1-0ubuntu2.23
Architecture: amd64
CurrentDesktop: Unity
Date: Sun May 17 17:36:04 2020
GsettingsChanges:
 b'org.gnome.nautilus.window-state' b'sidebar-width' b'192'
 b'org.gnome.nautilus.window-state' b'geometry' b"'1321x879+1501+562'"
 b'org.gnome.nautilus.list-view' b'use-tree-view' b'true'
 b'org.gnome.nautilus.list-view' b'default-column-order' b"['name', 'size', 'type', 'date_modified', 'date_accessed', 'owner', 'group', 'permissions', 'mime_type', 'where']"
InstallationDate: Installed on 2013-10-11 (2409 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
SourcePackage: nautilus
UpgradeStatus: No upgrade log present (probably fresh install)