I'm trying to use an action rule to update a multi select list box based on what's selected on a dropdown. This works fine until the selection on the multi select list box is manually deselected. Once I do that, changing the dropdown no longer updates the multi select list box. I've attached an example form and the following steps can be used to reproduce the issue on it:
1. Open the form in preview mode (same issue occurs on the browser).
2. Select Choice 1 on the dropdown. Choice 1 gets automatically selected on the multi select list box.
3. Deselect Choice 1 on the multi select list box.
4. Select Choice 2 on the dropdown. The multi select list box stays blank. Choice 2 is displayed on the text box, but the action doesn't work on the multi select list box.
Does anyone know a workaround for this?