Sticky scroll animation issues

Hey all, I have a sticky text on scroll section but experiencing 2 bugs:

  1. The section underneath the sticky section is separated and only becomes “stuck” to the section when scrolled. I would like there to be no spacing between them.

  2. The last text jumps into the next section on tablet and mobile devices

Any advice on how to fix? Thanks for your time!

Here is my public share link: LINK
(how to access public share link)