I don"t know the reason at all, but there is no flickering problem officially. I copy the original content of the document directly, and it can be used normally, but it always flashes when switching.
<mt-tab-container v-model="active" :swipeable="true">
<mt-tab-container-item id="tab-container1">
<mt-cell v-for="n in 10" title="tab-container 1"></mt-cell>
</mt-tab-container-item>
<mt-tab-container-item id="tab-container2">
<mt-cell v-for="n in 5" title="tab-container 2"></mt-cell>
</mt-tab-container-item>
<mt-tab-container-item id="tab-container3">
<mt-cell v-for="n in 7" title="tab-container 3"></mt-cell>
</mt-tab-container-item>
</mt-tab-container>