Here on Japanese.SE, sometimes we see furigana like 司る【つかさどる】, where the characters beneath the furigana get pushed apart because the furigana doesn't quite fit. Sometimes when I'm writing answers I find myself avoiding furigana because I think it makes it harder to read having things pushed so far apart.
But I've noticed that even in professional published writing, sometimes furigana seem to push characters apart. For example, I took this picture of a page from 連環宇宙 (the Japanese translation of Vortex):
On this page, 流暢【りゅうちょう】 and 上唇【うわくちびる】 each take up three squares instead of two because of how tall the furigana are.
I decided to search online to see what native speakers thought about this sort of thing, but I couldn't figure out what it might be called!
Is there a special term for this sort of thing?