..Other time steps cannot be segmented.
To reproduce:
# open 4D image (e.g. Other time steps cannot be segmented.US4DCyl.nrrd)
# create a new static segmentation mask
# change the time step to `t != 0`
# set a seed point using the `Fast Marching 3D` segmentation tool
# see how the green contour is places nowhere close the seed point