Vetur: Incorrect syntax highlighting when using nullish coalescing in template

[CLDXiang]

• [x] I have searched through existing issues
• [x] I have read through docs
• [x] I have read FAQ
• [x] I have tried restarting VS Code or running Vetur: Restart VLS

Info

• Platform: Win10
• Vetur version: 0.33.1
• VS Code version: 1.55.1

Problem

When using nullish coalescing（??） in template, syntax highlighting behaves unexpectedly:

While using || the highlighing is correct:

I don't know why but this problem doesn't happen on my macOS (with same VSCode extensions and settings).

Reproducible Case

Create a new .vue file:

<template>
  <div>
    <span>
      {{ aVariable ?? 3 }}
    </span>
  </div>
</template>

<script lang="ts">
import { defineComponent } from 'vue';

export default defineComponent({
  props: {
    aVariable: { type: Number, required: true },
  },
});
</script>

[simaodiascosta]

Similar happens when using typeof operator in a v-if condition

Using typeof

No typeof

[Dassderdie]

A possible workaround for the typeof could be to add brackets: