4👍
✅
That is because you are using "index" as key for the tabs:
<v-tab v-for="(t, index) in tabs" :key="index" :href="'#tab-' + index">
You need to use something more unique. I’d suggest, in your example, to use the tab’s title:
<v-tab v-for="(t, index) in tabs" :key="t.title" :href="'#tab-' + index">
You need to change also the line that creates the actual content:
<v-tab-item
transition="fade-transition"
reverse-transition="fade-transition"
v-for="(t, index) in tabs"
:key="t.title"
:value="'tab-' + index"
>
Source:stackexchange.com