Vue Starter Error

Cf. https://forums.creativeclouddeveloper.com/t/bug-rendering-img-causes-error/4564

Reported by: "Tobjoern"

Through my investigation I figured out, that it has something to do with the HTML markup, as the error sometimes disappears when different elements are uncommented or removed, though there are no clear patterns.

Error message:

Exception while invoking panel method on Plugin Id: com.adobe.uxp.starter.vue3, Panel Id: helloworld, Entrypoint: create, TypeError: Cannot read property 'firstChild' of undefined
    at insertStaticContent (webpack-internal:///./node_modules/@vue/runtime-dom/dist/runtime-dom.esm-bundler.js:231)
    at mountStaticNode (webpack-internal:///./node_modules/@vue/runtime-core/dist/runtime-core.esm-bundler.js:4679)
    at patch (webpack-internal:///./node_modules/@vue/runtime-core/dist/runtime-core.esm-bundler.js:4627)
    at mountChildren (webpack-internal:///./node_modules/@vue/runtime-core/dist/runtime-core.esm-bundler.js:4828)
    at processFragment (webpack-internal:///./node_modules/@vue/runtime-core/dist/runtime-core.esm-bundler.js:4999)
    at patch (webpack-internal:///./node_modules/@vue/runtime-core/dist/runtime-core.esm-bundler.js:4634)
    at ReactiveEffect.componentUpdateFn [as fn] (webpack-internal:///./node_modules/@vue/runtime-core/dist/runtime-core.esm-bundler.js:5180)
    at ReactiveEffect.run (webpack-internal:///./node_modules/@vue/reactivity/dist/reactivity.esm-bundler.js:223)
    at setupRenderEffect (webpack-internal:///./node_modules/@vue/runtime-core/dist/runtime-core.esm-bundler.js:5299)
    at mountComponent (webpack-internal:///./node_modules/@vue/runtime-core/dist/runtime-core.esm-bundler.js:5082)

Reproduction is available at: https://github.com/Tobjoern/ui-vue-3-starter-bug