Since last week I experience problems with (Dutch) subtitles. Sometimes it works but most of the time I see different errors. Most of the time the errors are Check internet connection or refresh meta-data. I've restarted the app (Pro 2.2), my iPhone (5S on iOS 7.1), my router (Cisco Linksys EA6500) and my NAS (Synology DS112+). Before this issue I never experienced this problem.
A friend of me experienced the same problem with Dutch subtitles: app (Pro 2.2), iPhone 5 (iOS 7.1), router (Linksys E4200) and NAS (Synology DS114).