[MonoDevelop] Description tool tips inconsistency

[Tomas Petricek]

Hi,
there is an interesting inconsistency (in my opinion) in when tool
tips with descriptions of members (shown in autocompletion drop down)
are displayed. I'm not quite sure if this is a bug or feature or just
something that's a side effect of some implementation choice, so I
thought I'd ask here.

The steps to reproduce the behavior are following (using C#, but it
behaves the same in my F# integration):
  - Type "System" and press "." or navigate to the end of (existing)
"System." text and hit Ctrl+Space
  - A completion list appears with some item selected (but not
highlighted) and a tool tip with information for the item appears

However, if you do slightly different thing, then the tool tip is not shown:
  - Type "System.R" (autocompletion appears and tool tip for
"System.Random" appears too)
  - Close the autocomplete (e.g. using Esc) and hit Ctrl+Space
  - A completion list appears with some item selected, but no tool tip
is shown (!)
  - Press up/down or down/up keys to navigate in the list and tool tip
appears...

Is this intentional behavior?

Thanks,
Tomas Petricek