Edit: meh, i should learn to read. So you're saying that the action works as expected, but the ComboBox is not displaying the last-selected option. That should not happen. If you are sure you don't have anything else that interacts with that Parameter (e.g. an Extender rule), you might want to talk to Support, it might be a version bug.
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Do you really need to use the Page action...? For dashboards, the traditional approach is to use an Embedded Dashboard component, with the parameter expanded in the "Embedded Dashboard" property of the component; then in the triggering component (i.e. the combobox) just have a Refresh action that targets the Dashboard containing that Embedded element.
Thank you so much for replying! I appreciate your assistance. I will test on your suggestion and if that doesn't work then like you mention it might be related to a version bug. Thanks!
