Some things just don't go well together.
Currently using Scroll Effect on a block that has Sticky can lead to unexpected behaviour. The reason for this is due to Scroll Effects occurring as the targeted block travels vertically as you scroll up or down the screen.
When Sticky is used on a block it will be animated as it scrolls into view, but once the section or block becomes 'Sticky', and is no longer moving vertically, Scrolling Effects can no longer track its movement to animated the block.
Fixing this issue is as simple as removing the saved settings for Sticky Sections or Scroll Effects. A quick way of doing this is to hover over the tool until the 'revert' arrow appears. Click this then select apply and it will remove any SquareKicker settings currently applied to that tool.