stretchH='all' and tableheader missing in vue frameworks tabs

Hello

I’ve tried to setup online demo but it seems like I’m doing something wrong…
Here is my template with Vuetify and Bootstrap cdn imported one:
https://codepen.io/chaehwa/pen/ZEYYXLw

I couldn’t get the handsontable inside of any tabs… Please let me know what I’m doing wrong. I will fix it…