Panel Active Tab -1

I would like to set active to -1 to display the final tab but this is not working.

This works as expected:

tabs = pn.Tabs(('A', 'A'), ('B', 'B')) = 1

But this does not:

tabs = pn.Tabs(('A', 'A'), ('B', 'B')) = -1

In the second case, no tabs are selected upon render.

The following works to achieve this functionality: = len(tabs)-1