I reported an issue to Naim support just before Christmas:
This is a note to let you know, if not already aware, that there is still a problem using slide-over under iOS 10.2 with the iPad Pro 9.7in model I am using. After deleting the app and doing a fresh install to re-initialise, the app appears on the scrolling list of apps available for slide-over. When selected, find rooms shows the available rooms but when one of these is selected it hangs trying to reconnect. Eventually the Naim app and the main app both crash. If I manage to pull-down in the Naim app only a partial list of other available apps appear and none of them can be selected.
After a reminder today, Phil says that they have not been able to reproduce the problem and no one else has reported it. Every time I try this the Naim app hangs trying to reconnect when used as a slide-over app. I can slide it back and out again but that usually leads to a crash. Mine is a 128Gb model. Do not have any problem with any other app I have tried.
if you have access to a similar model can you please try using the Naim app from the slide-over list, if you have not already done so, and report back what happens.