Steps to Reproduce

Given following view model and zul

import java.util.Arrays;

import org.zkoss.bind.annotation.Init;
import org.zkoss.zul.ListModel;
import org.zkoss.zul.SimpleListModel;

public class TestViewModel {
	private ListModel<String> model;

	public ListModel<String> getModel() {
		return model;
	}

	@Init
	public void init() {
		model = new SimpleListModel<String>(Arrays.asList("a1", "a2", "a3", "a4", "a5", "b1", "b2"));
	}
}

<vlayout viewModel="@id('vm') @init('TestViewModel')">
	<combobox autocomplete="true" width="18px" model="@load(vm.model)" autodrop="true" />
</vlayout>

1. type "a"
2. click item "a5"
3. type "a"
4. click item "a4"

Current Result

First item, "a1", is selected

Expected Result

Item "a4" is selected. Versions up to and including 9.0.0.1 work as expected.

Debug info

1st
1. doKeyUp > _typeahead
valueEnter=a, inp.value=a (no comboitems rendered)
2. setRepos > _typeahead
valueEnter=a, inp.value=a1

2nd

1. doKeyUp > _typeahead
valueEnter=a, inp.value=a1 (comboitem rendered)
2. setRepos > _typeahead
valueEnter=a1, inp.value=a1
3. onblur
onChanging fired

• the 2nd time input, combobox fills 'a1' very fast because comboitem are rendered already.
• when clicking an item, onBlur fires onChanging, then cause removing comboitems immediately, cause not able to click a comboitem.
• only can reproduce this error when the network latency is quite short < 50ms

Workaround

zk-5248-3.js