Toggling list and tree mode for a collection in the cp doesn't show anything

[r6203]

Bug Description

When viewing a collection in the control panel, toggling the view mode between list and tree mode (default), tree mode doesn't show anything.

How to Reproduce

Environment

Statamic 3.0.7 Solo
Laravel 7.27.0
PHP 7.4.10
No addons installed

Install method (choose one):

• Fresh install from statamic/statamic

[duncanmcclean]

I can confirm this bug report, it's happening for me too. I've added a screenshot below of what the Vue dev tools look like for the PageTree component.

After a bit of debugging, I found that it only happens after you switch from the List view to the Entry view. The site data property just becomes null after you switch. I tried to fix it but couldn't figure it out.

[robdekort]

Note: I was only able to recreate this on a fresh install. I can't recreate it somehow on an ongoing project. Neither in the pages or in another collection after making them orderable and expecting a root page.

[sjclark]

I've had this happen to on collections of various structures, refreshing the page resolves it. To be more specific its the act of toggling from List to Tree that is the bug.