ClickItem not selecting the proper item from a dropdown

What version of TestComplete are you using? And what browser are you using?

The technology used, assuming it's a web application, is it actually supported? See https://support.smartbear.com/testcomplete/docs/general-info/supported-technologies/index.html 

You can also use the browsers DevTools to inspect the HTML coding, to see how the list is generated.

I've seen this type of behavior before when the contents of the dropdown list are created dynamically.  In other words, the items that appear in the list aren't generated/populated until the list is displayed.  A three or four step process might do the trick for you.  

The four step approach I would try is this:

1. Drop down the combo list
2. Delay 250 ms so the combo can populate
3. Refresh TestComplete's object list so that you know it has the list items
4. Click the item you want

Sadly, I don't do JavaScript.  I'm a VB script only guy. In VBScript that would look something like this:

Set TestCombo = browser.pageLeaveHomePageGc.framePtifrmtgtframe.formW3lvLeaveTranG.selectGDerivedW3lvDescr500
TestCombo.DropDown
Delay 250
TestCombo.Refresh
TestCombo.ClickItem("Vacation")

I think you should be able to accomplish that in a Keyword test using the available functions.  I'm more than a little out of practice using keyword tests.

Best regards,
John

P.S. Pro tip on name mappings.  Shorten those names up and standardize the terms when you create them.  Life will be easier in the future if you do that. The ones TestComplete creates are always too long.  It makes reading code painful. 

I try to keep them to a max of ten to twelve characters when I can.  For "select" I'd use "sel".  For "frame" maybe "frm".  Use whatever makes sense to you and be consistent.

The image shows no values for the dropdown. Is there an easy way to put the pause into the javascript line? I tried searching, but couldn't find anything.

The click is supposed to go on an item called "Vacation", in the "Test Log" you can view each item picture to see what was happening on the screen before and when the action took place.

You can view your Mapped Objects browser.pageLeaveHomePageGc.framePtifrmtgtframe.formW3lvLeaveTranG.selectGDerivedW3lvDescr500 to validate and manually adjust the mapping.

Is your 20+ list slow to load? if so you are attempting to click on a moving target and I suggest you add a short pause.