Hi @franse - thank you for this. I've been able to resolve it, I believe by removing the preloader so does indeed look like a conflict. The above JS function solves it - hopefully the Wappler team have another solution as the preloader is useful for UX.
Thank you guys for this post. Been happening to me and driving me crazy. The cuprit for me is if I have the preloader on the page AND have backdrop on my cookie notice which is an off canvas showing from the bottom, the page is frozen after hiding/closing the off canvas. If I have the preloader and do NOT have the backdrop on the off canvas, the page scrolls fine once the off canvas is hidden/closed. Removing the preloader removes the conflict when using backdrop.