Confirmation buttons in mobile app on selection from dropdown

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Hi, We are seeing a problem where some users make a selection from a dropdown and the single click is accepted immediately, but then other users will have to confirm by selecting one of three buttons (prev, next or done).   The behaviour can't be narrowed down to an Android version. Users that see this behaviour in the app will also see the same behaviour when accessing through a browser.  This makes me think it's something in the phone's settings but can't find out what.  Any ideas would be appreciated.  See the screenshot below for the problem buttons. Some users see this. Some just make a selection and the selection is accepted immediately and the popup closes:
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1 answers
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FYI, We seem to have resolved this by making Chrome the default browser. The above behaviour only happens with the Samsung browser.

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