Contact shadow issues

Hello folk , i am try to use contact shadow like the example on the threejs site but there is some issues that i cannot solve it ,
when i try to use it with scroll trigger gsap , the shadow disappeared even if i scroll the shadow camera to the target scene ; is there a way to connect between my camera and shadow camera cuz i need to move and rotate the base camera many time ?
i feel it a bit complicated to get it, sorry for that
my minimal demo : Edit fiddle - JSFiddle - Code Playground

any help plz?