WP-optimize & clarity micorsoft

Hello,
I am starting to use microsoft clarity. It provides heatmap for websites which is great. However, the heatmap shows without CSS.
In their troubleshooting guidelines, https://docs.microsoft.com/fr-fr/clarity/troubleshooting-heatmaps, they explain :
Trouble spot Your site uses a temporary style sheet.
Solution Make your CSS permanent. Or, view your recording or heatmap before it is changed/deleted so that the CSS gets cached.

Do you know if there is a way to get a css permanent even using minify ?
Thank you for your help.