It’s not very clear to me either. Something to do with some bindings being more “helpful” than others in offering options via channel to Items, which then changes the Item behaviour away from being like a default [%s] existed.
I think because this is not a clearly defined default, the UIs are not consistent either.
Safest to assume that you get what you ask for, so if you don’t give a [state presentation] then you might not get one.
The opposite also applies - sometimes you get a display you didn’t ask for and may need to suppress it with [ ] !!