I noticed this bug report mentioned in this video.
Between @1:30 and @1:43 in this video, a bug is mentioned.
In order to get the animate path to perform properly, the person in the video says that he found it necessary to slightly twiddle the polygon path. He says he’s not sure if it is a bug.
(Since this is their video, and not mine, I don’t know which version of DVR 17 they are using).