Document Tree macro doesn't properly work when using the "openTo" parameter and setting Hidden Docs to True

Steps to reproduce:

1. Create a page with this content:

   {{documentTree openTo="document:Sandbox.TestPage2" /}}

2. The tree is opened to the Sandbox.TestPage2 node
3. Change your user's preferences and set "Display hidden documents" to Yes
4. Reload the page from step 1
5. The tree isn't opened to the Sandbox.TestPage2 node

Might be related to the fact that there are a maximum of 15 branches opened at once. You need to click on the Eye icon to see more.