scrolling Issue with sidebar on posts

This issue occurs on your live demo pages as well (Article and category pages)

I am adding a wetransfer link below with my video screen recordings. You can see 2 videos inside the wetransfer folder (one is my website and the other one is yours)
https://wetransfer.com/downloads/7b565f06737e495fb1ca492ce98b6a7c20200614095046/b9449f4d264d3c19bc373f78118c6ff120200614095112/d01f3f

Note, the issue happens only on article and section front (category) pages.
Basically, when you get to the bottom of the article/category page right before the footer while the cursor is placed over the article and not on the sidebar, you will find yourself in a state of infinite scrolling.

It looks like that on article/category pages, the sidebar is having an issue to detect when the user arrives at the bottom of the page what interrupts the sidebar to change its position from fixed (sticky sidebar) to absolute. you can see it clearly happens as inspect element was open when I recorded my screen.

Important remarks:
1. I turned off plugins in order to verify that none of them are causing the issue
2. If it happens on your demo website it means there is an issue with your theme integrated code.
3. I am using chrome Version 83.0.4103.97 (Official Build) (64-bit) on a mac OS 10.14.5 Mojave if that helps you to further investigate.

Let me know if this information was helpful.

The page I need help with: [log in to see the link]