Scrollbar broken


I’m making an app with vue + electron + Bulma and I use templates from here.
For two of these templates (kanban and Image Timeline), the scrollbar is stuck, and I’ve to refresh by pressing F5 if I want to the template to work properly.
I’ve no errors into my console.

This is the before refreshing picture

This is after refreshing

You can note that it sends me at a random position of the page, and when I refresh it sends me at the bottom.

Please help !!!