Time table

So I came back from a long break and just started playing again at INN.

I assigned a gate to every plane but everytime a plane is ready to land I always have to confirm the gate again.

Why do I have to confirm it if it is already assigned? Or am I missing something?

Isn’t this how it’s supposed to work, you assign a gate and when it’s not occupied the plane that is assigned to that gate shows up as ready to land?