Hi there,
Thanks for writing in! So you want to make the sidebar sticky? Maybe it won’t work as expected and some other visibility issue might arise. However is you still want then we could provide you some custom CSS that you can try. To assist you with this issue, we’ll first need you to provide us with your URL. This is to ensure that we can provide you with a tailored answer to your situation. Once you have provided us with your URL, we will be happy to assist you with everything.