Could you delete the device from smartthings and add it again.
Just after you have add it , is the device show it "no connected" again?
If the MediaRenderer Connect can find it and add it, then all information is correct, I have read Ubi use a dlna software from android, some android dlna software creates a new id or port every time the device is turned on or rebooted, the MR device is not recognized again by smarthings if the data has change, Smartthing must to find it every time with the same id and data, I have hardcode some devices to find it again if they change the id data, The normal search start when a MR device change ip or port, the MRC search by unique ID each 3 min and update the info in smartthings, but some software MR change even the unique id in each reboot.
Maybe the ubi is some of them, if you can help me sending the data from your ubi, I can hardcore this device to find the way to update the id data in smarthtings , in that way the device can be updated automatically
You can send me the logs when you add the device, and after the device is added, then delete it from devices, disconect the ubi, and reconect to reboot and try to add it again to and send the logs too, in this way I can see if the ubi is changing the id data every time, and I can find a way to find it automatically
If you have some other dlna media renderer try to disconnect them from network to see in logs just the data from ubi device