So I have a tabNavigator with 3 tabs. I have set creationPolicy ="all" so that 
to the user it displays quickly. 

The issue that I have a combobox on tab#3 of the tabNav. and when I set 
creation="all" and tab#3 is selected the combobox is empty. If set the 
creationpolicy="auto" the data shows up in the combobox.

I assume that what is happening is that tab#3 is getting created imeediately 
before the data arrives. FYI the data is requested the minute the entire tab is 
shown, which when creation is complete always shows tab #1. Thus I think the 
vbox and its children are getting created without the data.

So I assume some how I need to invalideSize and invalidateProps on the combobox 
when tab#3 is clicked so it will pull in the data?

TIA, J



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