Slot displaying None in template after being captured in Form

So i’m capturing some values in a form and I’m trying to display them back in the form submit.

  • It’s the last slot in the form (it seems I’m not the only one).

  • I get a proper value get calling tracker.get_slot in submit but the template is displaying None.

I can work around that by not using a template or forcing the values but can anyone explain why it doesn’t work?

Here’s the setup: