hangup when evaluating properties scene.t_resolution or scene.z_resolution for CZI images

When opening a CZI file in python, evaluating the properties scene.t_resolution or scene.z_resolution seems to hangup.

example image: T_3_CH_2.czi

Example Code:

import slideio

slide = slideio.open_slide(path=image_path, driver="CZI")
scene = slide.get_scene(0)

# the following line blocks and never returns
scene.t_resolution

occurs on slideio==0.6.1 environment: python 3.6.1, ubuntu 18.04 and the following python stack: requirements.txt

any ideas if this occurs just on my environment or if this a known issue?