I am using ELAN 6.4 and going through a process in which I use the timings of a child Included In tier A dependent on tier B to create a new parent tier C using Create Annotations from Overlaps, then change the parent of tier A to the newly created tier C using Change Parent of Tier.
While I have no problems creating the annotations on tier C, a problem occurs when I select Change Parent of Tier. Only the first annotation on tier A which falls within the original annotation on parent tier B is successfully copied to the new child tier D (dependent on tier C). All other annotations on tier A are not copied.
This has happened for me in two different files, so I suspect that it may be a bug. I run Windows 10, and I’d be happy to provide any other information that you need.