While updating the website today，I noticed an issue with the sidebar menu，After clicking on item A，the sub-items of item A appear，but after clicking on item B，only the sub-items of item A still appear，After checking in the backend，it turns out the issue was caused by the cache。
先前為了提昇效能及提高搜尋率，啟用了後台的「快取設定」，而造成此問題，因此到「全站設定」-「系統」，將快取功能關閉後，即解決此問題。
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