Hydration mismatches in simple SSR example

[Llois41]

Hi,

I'm currently figuring out how to get a simple SSR example app running using Vue's renderToString-method since it seems very simple. However after "upgrading" the example https://vuejs.org/guide/scaling-up/ssr.html to a real build using vite, I'm not able to get the hydration correctly. Does anyone have an idea where it is going wrong?
I tried to debug the hydration mismatch but I only saw that at some point Vue seems to render a v-cmt (which I guess is an empty comment) component but I don't know why.
I even tried to set VUE_PROD_HYDRATION_MISMATCH_DETAILS (see https://vuejs.org/api/compile-time-flags#VUE_PROD_HYDRATION_MISMATCH_DETAILS) flag but it does not seem to have an effect on the error message.

Reproduction repo: https://gitlab.com/Llois41/gitlab-merge-bot

I'm thankful for any advice on this.

[Llois41]

I was able to get it working using a proper Vue component instead of the inline template with data combination