False positive error on v-if/else keys in Vue 2.7

[dsl101]

I've just configured Volar + Sublimetext, and I think I've got it set up correctly for my project (Vue 2.7-based, not ts). With this kind of template code:

<template v-for="(val, key) in obj">
  <div v-if="key === 'thing'" :key="key">{{ val }}</div>
  <span v-else :key="key">{{ val }}</span>
</template>

I'm seeing this error:

Since it's Vue 2, I can't put the key on the template element. And since I'm reading from an object, I'm certain the keys will be unique. But I guess because it sees the same variable in the div and span, it's triggering an error, which then pops up the ST console panel every time I save.

Any advice on how to configure for this? Or where to post if it's not a Volar issue?