Sorry no codepen , but maybe some has stumble over the same Problem:
On a page with a lot of ScrollTriggert Animations, it works great so far. If the user switch to an other page, and use the browser back button, some of the animations not working anymore. on the elements wit the problems, the starting values are set (opacity: 0.5; transform: translate(50%, 0%);), and when i switch "markers: true", the Markers not shown at the Element, its is deeper on the page, but why? Any ideas? it appears only, if you use the browser back buttons, if you switch back to the page using an link, it works all fine.