Storyline 360 Scrolling panel disappearing problem

Hi all,

I created a scroll panel as my dropdown list so that user can select the language.

When the scroll panel opens, if I scroll up and down the panel by scolling the mouse wheel (the scroll wheel in the middle of the mouse), the panel can still be displayed till I select a language. But if I clicks the vertical scrolling bar at the right of the panel, the panel will disappear and I need to reopen the panel to select a language. I tried several ways to keep the panel displayed, but none of them works. I didn't find solutions on the internet neither. Anyone can help me please?

Thanks in advance

Claire

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