No live demo. But I was able to reproduce the error better in the codepen. With the second, opened element everything works and the markers are also visible, but as soon as the first element is opened, the second one doesn't work anymore.
ScrollTrigger.refresh(); Solves the problem on Codepen, but not in the project
I'll put my demo in the project in the hope of finding out more...
https://codepen.io/microlinofire/pen/qBgeeKQ