Hi.
Margins are going crazy:
1) bk-text-flow.minimal_height = 60 (gui_styles.lua:161) (90 beacuse 60 x 1.5 interface scaling):

2) Labels don't stretch the flow:

Hi, this isn't something that I can fix, because th GUIs beheviour is centered to make working the base game GUIs but not modded one, some of this errors are not fixable from the available modding tools, I already ask to dev to help me fix this kind of bugs without result (open the forum link):
https://mods.factorio.com/mod/Booktorio/discussion/5e87e1b17d5c13000c654b33

I will close this topic because is duplicated.