Due to an update to the user interface, users can no longer copy and paste links to attachments from a page’s attachment view.
It was already a faff before, but now it’s simply impossible, unless you want to use the attachment macro, which isn’t an option.
Why is Atlassian making things increasingly complicated for users? Or did you fail to test the UI update and forget to add links for listed attachments in the relevant view, meaning this is ‘just’ a bug? Hopefully this will be fixed soon...