Parent transform: translate(0, 0)
Like any other sticky library, this one also does not work if the parent has the transform: translate (0, 0) style. This library is one of the many that I liked, it would be very cool if the function of support for transformed elements was added in the future.
This is impossible to implement whit libraries such as this one, because in order for the element to bi sticky relative to the viewport, it has to have position: fixed. Here is the explanation of what is happening when you put fixed element inside transformed parent: https://stackoverflow.com/questions/15194313/transform3d-not-working-with-position-fixed-children/15256339#15256339
Unfortunately there is no workaround for this.