Seems that I can’t hold shift to measure two layers when one is scrolling and the other is fixed. Not sure why I wouldn’t be able to, but that is something that I find myself needing to do regularly.
Please remove the restriction of comparing those elements!
I can’t reproduce this. Maybe you need to also hold Cmd/Ctrl if these objects are nested in other groups/frames? And yes, you don’t hold Shift to measure distances, hold Alt/Opt.