Tasks in Timeline view disappearing in the new copy of a duplicated project

Hello,

I just realized that when I duplicate a project with deadlines and dependencies, some tasks in the timeline view of the new project are missing. Not out of place or anything - completely missing! So what I do is go back to board view and remove its due dates, which makes it reappear in timeline view, and then I set its start and end dates again. It bothers me not because my solution is cumbersome or anything, but because it happens quite often! I duplicated 10 projects today, and except for 2 of the copies, a few tasks were missing from all other copies. Is this a bug? Has anyone else reported this issue?

Thanks for your time.