Ionic/vue 3.1 compat mode doesn't respond to @click events

I suspect this might be related to changes in “isCustomElement” but I can’t find it, and I surprisingly don’t see anyone else talking about it so am starting this thread. Please let me know if I should add a bug on the @ionic issues page, but I’m a bit intimidated to do that before coming here.

I made a repository with a simple button that calls alert onclick.

Once I enable
config.resolve.alias.set("vue", "@vue/compat"
in vue.config.js, @click events stop firing.