Review totals are broken on AMO

Something appears to be off with the bars on the review totals for my add-on list in AMO. The bar is empty for the 4 and 3 star reviews, even though I have reviews for those amounts.
Looks like maybe an AMO bug?

AMO currently rounds star ratings to the nearest 10%. You have 111 reviews. The 1-star review has 6 stars, which is 5.4% (rounded to 10%). The 4-star review has 5 stars, which is 4.5% (rounded to 0%).

I have filed the following issue to explore the possibility of increasing the precision of the visual appearance of the per-star rating: