Trouble opening files within certain subdirectories

I have a network drive mounted via smb. I can view all files fine, and access 90% of them. However, Nemo (and Nautilus) won’t open files from a few subdirectories. I’ll be able to view all the files within them, but as I attempt to open the file(s) Nemo will respond with “Sorry, could not display all the contents of ‘filename.mkv’: Not a directory”.

The files are all .mkv, opening them with VLC does nothing. Other .mkv files on the same drive are fine, this issue is limited to a few subdirectories. I can access and open all of them on the host machine, as well as other machines on the network.