I have a new Roon Nucleus and using my iPad as the remote.
It plays perfectly except it drops signal between the iPad and Roon sporadically.
The note on my iPad says connection lost, check to make sure Roon Nucleus is connected. Usually with in 45-60 seconds it reconnects. Music continues to play even though connection lost. The Roon is hardwired to my router. There is no issue with my internet.
This could be due to a networking issue as @Blackjack has noted. Do you by any chance have multiple access points and perhaps the iPad is switching between them? Have you tried reinstalling the Roon App on your iPad yet? It may help with this behavior.