This seems like if it were a bug, it'd be a bigger deal and more people would have this issue, which is why I'm posting here. However, it does seem like a bug-- I'll bring it to Github, unless someone here knows what this is.
On any of my Notes that contain a Linked attachment (not where the item is embedded), Ctrl+Clicking the link causes Windows to throw an error:
Windows cannot access \\C:\Users\kauffy\{internal name of attachment.filetypeextension}
It does this for both new Notes I create, and old notes I have already created.
For some reason, it's causing Windows to try to reach the file path as though it were a machine name: "Windows can’t find the host name "C:" using DNS."
I used the Joplin dev tools to look in at the source, and it appears that the HTML links to those items contain a // that breaks retrieving the file.
In the source, the link appears like this: href="file://C:/Users/kauffy/.config/joplin-desktop/resources/da244c64e05b44b9a6600b3309facffb.pdf"
However, if I go in and delete the two /'s after the file:, the link will work, like so: href="file:C:/Users/kauffy/.config/joplin-desktop/resources/da244c64e05b44b9a6600b3309facffb.pdf"
You are correct. I was overthinking the search terms and didn't find it.
However, it looks like nobody has addressed it, as one attempt was made that was a bit hacky, and the change was rejected, and it doesn't look like anything else was entered again.
But the other user and I can't be the only users of Windows, nor even the only users of the Windows rich editor. I'd think there'd be many more complaints.