MDL Progress with masonry display CSS

Hi Google Team,
I tried taking the progress bar component from MDL and put it in a masonry archive loop with 3 columns & 9 items. It seems only on the 3 first progress bar it is displayed, from the fourth onward, it is not visible although the elements are in the right place.
Things i've tried:
- changing their position css property ( unfortunately doesnt help )
- changing z-index css property ( nothing happened )
- adapt script into jquery ( I think the problem is not JS )
- remove column-count css property from loop container ( progress bars are displayed correctly )

Cheers...