You can dynamically update individual entries in a parent-child instance list without collapsing the visual tree

To update VLF-ONE instance list items refer to Handling Instance List Entries in VLF-ONE 

To do this in VLF-WIN use #AvListManager.BeginListUpdate Mode(DYNAMIC), as in these examples:

To change SECTION ADM-02 to have a VisualID2 of hello:

Invoke Method(#avListManager.BeginListUpdate) Mode(DYNAMIC)

Invoke Method(#avListManager.UpdateListEntryData) AKey1('ADM') AKey2('02') VisualID2('hello') BusinessObjectType(SECTIONS)

Invoke Method(#avListManager.EndListUpdate)

To change employee number A1012's VisualID2 to FREDDO FROG:

Invoke Method(#avListManager.BeginListUpdate) Mode(DYNAMIC)

Invoke Method(#avListManager.UpdateListEntryData) Visualid2('FREDDO FROG')  Akey1('ADM') Akey2('01') Akey3('A1012') BusinessObjectType(EMPLOYEES)

Invoke Method(#avListManager.EndListUpdate)