I consider this to be a bug, and I have reported this before.
I have a two separate graphic PNG files (a 'home' and an opposition football club badge) that both appear in a video at a specific point in time (0.8 secs in), which also has animation attributes assigned.
For a new video announcment I simply swap out the opposition club badge graphic for the latest opponents club badge - using the 'Replace' option. In doing so, all the original animation attributes are retained within that club badge replacement, which is great and exactly what I want.
But the starting position timeline is NOT retained. It always places the new replacement graphic at the start of the video... so I have to manually move it to align with the the start of the home club badge.
This is fiddly and a pain - and I think it's a bug because it would be strange that it manages to pick up and retain all of the various animation attributes from the previous replaced graphic, and yet it is not capable of inserting the replacement graphic at the exact same timeline position?