Hello Mark,
Sorry missed your answer.
Roon app is unable to find the Roon Server on the Oladra two different systems.
The issue is with the Tab9+, other Samsung products connect as does Apple and other laptops and computers.
The 9+ had a full factory reset back to original I installed the Roon App still the same result.
Restarting the Roon Server app in the Oladra will reconnect the Samsung Roon control app on the Tab 9+ but only of the limited timing as in my above post.ie on startup or after 6.5 minutes.