Hi Max,
That’s a neat trick! Thanks for sharing.
Disappointingly, this produces the exact same issue for me in my project. I’m wondering if there’s a project settings that might inhibit the current position on rail from updating when edited inside of a sequence track? I can’t see anything obvious in the level sequence section of the editor.
top image below - no effect on camera position
bottom image below - camera updates along rig
Result: keyframes added to the timeline do not update the camera position
