BootStrap 垂直嵌套选项卡活动选项卡不起作用

问：

我正在使用 BootStrap 在侧边栏中创建带有嵌套选项卡的选项卡。如果我单击嵌套元素，我会看到“活动”类发生变化。问题是即使我单击第一级上的元素，它仍然保持“活动”。如何更改此行为？我在 BootStrap 文档中没有找到这样的东西。

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