I’m currently testing the ROON, and I have to state that app for iPhone is useless, there is no filter function, and with search function I can’t find anything.
To be honest I don’t know what is the purpose of search function? or how it works.
Example:
On iPad when typing Nelson is search I get this message:
And I know that I also have Lukas Nelson in my library, when typing Nelson in filter, it is showing fine.
Perhaps hitting ‘Return’ on your iPhone keypad, after having entered ‘nelson’?
For me that shows a picture similar to the second one you included in your post.
Looking at what comes up while typing is popular results across the whole Roon database. If you have a less universally popular Nelson it won’t necessarily come up until you put in the whole name and/or hit return.
I would also love to see the iPhone app updated to include scrolling through an aphabetic/numeric indicator to navigate to an artist/album title/date added. Focus and Filter features would also be greatly appreciated.