Graphs do not update when hidden

I have a tab control where each tab has a graph that is embedded inside of a typedef. When the program is executing and I change tabs, it takes a few seconds for the graph to update even though the data has been long posted. This would be ok, except when the program ends and I change to a tab, it does not update the control accordingly.
Why does this happen. Are there any solutions?

These pictures show the tab control. The graph and numeric control are a custom control on the tab page. During the test I use a reference to the custom control to read the numeric control and write to the graph using the value node. Probing this point shows the data being written to the value node but unless the particular page is open at the time it doesn't get written to the display. I even tried writing to the "value (signaling)" and using an event to write the data to a value node rather than a reference but it still doesn't update the display unless that tab is visible at the time.
The only way to do it seems to be putting a graph indicator on the tab and writing to that directly. It means a lot of recoding and a messier result :-(
Attachments:
Tab control.JPG ‏73 KB
The test.JPG ‏29 KB
Event.JPG ‏39 KB

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