See: http://webix.com/snippet/22eb684e . This is an AngularJS example.
If you click on a row in the first datatable, the second datatable is now blank (because it is zero-width). If you remove the webix-ui property then it displays correctly. Should the blank webix-ui attribute work here? It certainly works if you add a datatable outside multiview.
I have what I think is a related problem in my production application, except the issue is on going back to the first datatable from the second (detail) screen (and I don’t have any blank webix-ui attributes). I couldn’t reproduce that particular configuration but I think it is the same problem.