Default UIKit theme "page tree navigation in sidebar" option - how much experimental exactly?

[soyerH]

Hi all! sorry for bad english.

Does anybody have experience with "page tree navigation in sidebar (EXPERIMENTAL)" option ON? I'm planning to use it on production website.

The only (but really annoying) thing I have stumbled - is when you copy and paste Page Edit URL in browser's address bar (like mydomain.com/processwire/page/edit/?id=1025) it opens Admin Page normally, but only with page-tree panel, and with "main" window blank, as if no page was selected for editing.

Is there any other major known problems?
And maybe anyone have solution for described behavior of direct url entering? 

Thanks in advance.