I have attached a sample project for you to reproduce the issue.
I added a tabcontrol to Find Results tab at the bottom.
Steps to reproduce:
1. Set Auto Hide to Find Results tab
2. Move the mouse out of this tab so it hides itself
3. Bring it up again by moving the mouse over the Find Results tab
4. Once it shows up, move the mouse over the second tab "test2"
Find Results tab will automatically hide, you cannot navigate to any of the tabs in that tab control
Thanks,
Karthik
DockingDemo_8bc6cbb7.zip