that was the behaviour of question selector in 2.06.
Could be changed, but it implies to totally change the logic of it.
So please : discuss of that during the next meeting.
For now I close the question : we need visibility in the bugs
(but I'm agree that something we should change. )

I have a Version 2.05+ Build 150520, send the screenshot.

Using select2, maybe removed on 2.06 ?

No : not removed : same for Version 2.06+ Build 160123

ok I see.
noway to put back select2 : a scroll bar in a select is by far worst than what we have now.

Right now : a simple click to question type leave open the select box, and then it's possible to scroll the page. So it's just ok...
If really someone can't use it, he can just use the simple mode selector.

"a scroll bar in a select is by far worst than what we have now. " ...
It's a Point of view.

Click , move with "scroll" mouse without leaving place

Yes, it's a point of view.
My point of view is that scrolling the select box is more difficult than scrolling the windows.
But, I agree that both systems are bad. We should replace it by something else.

Send 3 screenshots from 3 browser.

This 3 browser use scrollbar on dropdown. Don't have time to test on IE.

PS: 2.06 have scrollbar + search/filter

yes, and scrollbar on dropdown sucks, in my point view.
scrollbars on windows are easier to use, in my point view.
we should find a better system, not using scroll at all, in our point of view.

I think it is a minor annoyance. Anyone not liking the far scrolldown could use the simple selector.

Denis, if you want to set a maximum height on the simple selector, if not already fixed there. Would you do that?

@c_schmitz : No, i leave to LouisGac , don't want to fix and been reverted some week ago.
And actually : can be done in plugin.

I test again : it's very long to get the good question type , but if you are happy with this, no problem : i always set "default" to simple selector nafter install.