I have to stop then restart the Twonky Server quit often after the latest update because somehow I can not connect to it anymore, the web interface is also not reachable and it seems the service freezed or stopped completely.
I have no problems with another UPNP Server (MinimServer)
Only a small film collection. I use Nova Player on an Android TV box playing files from QNAP. But Twonky had problems with high bitrate UHD remuxes anyway. I disabled Twonky now and use WebDAV which plays fine without stuttering. Nova Player doing all the fancy stuff getting film infos from TMBD etc. Plex seems to be a little overkill for my use case.