Hi Rashad Rivera,
By stays hidden you mean it is not on top, right? RadWindow is modal from UI - you cannot click other controls (beneath RadAlert, Confirm, Prompt) but it will not block the UI thread. This means that if you activate by code some of the windows that are below they will go on top. We are not planning changes in this behavior.
You can use Dispatcher.BeginInvoke() when opening windows, alerts, confirms etc. This will prevent the window from not showing on top.
If you still have problems please let me know.
All the best,
the Telerik team
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