Dear @KingJut
Could you please make sure of the following:
Wordpress, Lay Theme & Laytheme's Addons are all up to date ?โจ
Any custom CSS or JS that may interfere is temporarily removed.โจ
Any third-party plugins are de-activated to see if this resolves the issue.โจ
If using a WordPress Cache plugin, disable it or clear your cache.
Talk soon & best wishes
Richard