What happens if the overload selection window is open in addition (like in KDevelop)?

I only use Kate/KWrite so didn't test it on the others previously - sorry.
It actually only works in Kate and KWrite, and has no effect on Kile/KDevelop. KDevelop is obviously doing some special stuff, but visually the Kile autocompletion seems identical to the one in Kate/KWrite so I'm surprised that it doesn't work.
Any idea what's causing this issue or where I should look in the KDevelop code?

I remember that @cullmann intentionally implemented it this way: Going upwards will hide the completion list and not wrap around.

@cullmann Any take on this? Either accept, or reject.

Also, the unit test need fixing obviously...

I think the idea was that it is an easy way out of the completion.
I am not sure if wrapping is what one would expect.

Indeed, question is if wrapping helps: If you see 5 entries, and you see the last one is correct, then moving up would be ok.
But if the completion contains >> 10 entries, this will not work. And then, there is still the "End" key on the keyboard as dedicated action.