Steps to reproduce:
* Open MITK-Data/3D+t-Heart
* Choose file reader: MITK DICOM Reader v2 (autoselect)
* Use spin box (arrow up) in Image Navigator to navigate to last time step
--> Slider alternates between time step 0 and 1 (data set has 3 time steps)
If you use the handle of the time step slider directly, it works!
Exporting the image to .nrrd does not solve the issue.
However, that issue did not occur with other 3d+t .nrrd images.