I reopen the bug. It is actually the case Nautilus GENERATES thumbnails disregarding of the setting. It's especially annoying when it happens while eg. downloading the file: it re-reads it numerous times and wastes system resources.
Please see the attached screenshot: everything is very clear.
The setting's value has been there for ages. Still the previews are generated and regenerated on file change.
I reopen the bug. It is actually the case Nautilus GENERATES thumbnails disregarding of the setting. It's especially annoying when it happens while eg. downloading the file: it re-reads it numerous times and wastes system resources.
Please see the attached screenshot: everything is very clear.
The setting's value has been there for ages. Still the previews are generated and regenerated on file change.