While playing with MDL-64783, it was detected that the "Get Predictions" link in the navigation bad (breadcrumb) does lead to missing sesskey problem.

Not sure if it's the unique case where an action is also clickable in the navigation bar, maybe it shouldn't, specially if you are already there, in the very same page (via POST) from the models page.

Reproduced in 3.7, it may affect other versions and other elements.