I swear those lines didn't exist when I copied the first time!
Sure sure, eaten by Santas reindeers :grin:
Anyway, WFM.
11:57:15: Geany INFO : Geany 1.37 (git >= 915cf6e8), en_AU.UTF-8 11:57:15: Geany INFO : GTK 3.24.20, GLib 2.64.3 11:57:15: Geany INFO : OS: Linux Mint 20 (ulyana)
Perhaps the Arch bleeding edge GTK has been changed so it does not calculate a sensible size when the window is hidden.