Hello.
Thank you for your reply.
Wordpress: 5.3.2
Elementor version: Elementor PRO - Version 2.8.3
Widget: Form builder
Theme: Twenty Twenty
Web browser: Chrome
OS: pc win 10
The website is not yet live, I am currently building it locally through Bitnami Wordpress stack.
But not long ago I had problems with checkbox appearances on live sites as well.
A screenshot is provided in the original post.
Cheers