hoveron fills doesn't work on charts with rangeslider

Hello everyone,
when I try to hover the fill in a chart using a rangeslider the tooltip doesn't appear.
I have made a codepen repoducing the issue: [Codepen](https://codepen.io/LudovicoMioBT/pen/yLWWVma)
Maybe I'm missing some other configurations to make it work properly

Thanks in advance!