@louiseoy, as much as we are sure about it the theme itself has no bug or issue as tested on the latest version.
If you have any third-party plugins installed then there could be some plugin conflicts causing this issue. So kindly verify it by disabling those plugins and re-activating them one-by-one to see if problem lies within them.
If still this issue persists, kindly write us back. We will try to help you.
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