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So basically the DOM isn’t changed so Vue doesn’t recognize the change. To give Vue a hint so that it can track each node’s identity, and thus reuse and reorder existing elements, you need to provide a unique key attribute for each item. In case of element ui table you should fill the row-key attribute. Which is listed in table-atributes
Adding the row-key will solve your challenge
An alternative way to make it work is replacing the :checked by v-model. but still it’s good to provide the row-key
Source:stackexchange.com