Context:
I am implementing a flex auto-suggest combobox - as the user types in each character: Consider the string 'Stackoverflow' and user input = 'st'

1) the data provider is filtered to show all items starting with 'st' 2) text is set to auto-suggest string such that the un-typed part is highlighted.

So for instance, the combobox text may contain st'ackoverflow', where 'ackoverflow' is highlighted using setSelectedIndex()

Issue:
When I hit back-space or delete, and check the 'this.text' value, I expect that the last un-highlighted character ('t' in the above case) gets deleted and the data provider is filtered to show all items starting with 's'. However the text property contains 'st', as before

Question:
what am I missing? What else can I try out?