When I tap the Location switcher in the iOS app I see my home server and my local server for synced content, but tapping the local server does nothing. I deleted the app and reinstalled to see if that would fix it but it's the same.
If I browse to the media I've synced on my home server it shows the synced icon, but if I try to play it I get an error:
Couldn't create the playback session for this item
This is on iOS 11.1 with Plex 4.20.