No subtitles over FTP service

Got installed Infuse 5 on my iPhone 7+ and I’ve got WD MyCloud NAS server, when I’ve added MyCloud on my local netowork everything is fine with subtitles, they are showing up, but what I done as well is set up a FTP access to my drive to be able watch movies outside my local network. But when added new setup connection in Infuse app, it’s connecting and finding folder with movies, but when I play movie there is no subtitles, movie and subtitles got exactly the same name.

Can you try browsing the share via the Add Files menu to see if the subtitles are visible there? This will present a full list of all the files Infuse is able to see (including subtitles, and even files that are not supported in Infuse).