Kinda funny that while I was investigating some weird font issues with Wani (see A new native Android app), I realized that I’ve been seeing the same issues in Kantan as well… 
I blamed it on my phone’s font but it turns out it’s non-linear font-scaling:
This causes the furigana’s height to be overblown, making it look far from the text when the font scaling is higher than 1:
This will be fixed in the next release, shall look like this regardless of font scale:
