My app, when running inside Flatpak with org.gnome.Platform v43 runtime, its header bar (as
HdyHeaderBar widget) becomes too big. I don’t know what causes it. Seem not to be libhandy version, because when running outside Flatpak, in Ubuntu 22.10 (which comes with libhandy 1.8), the header bar size is still normal.
Here is what it looks when running inside Flatpak:
And running outside Flatpak:
Can someone suggest what to do to fix it?
The XML file of UI: CoBang/cobang-resp.glade at main · hongquan/CoBang · GitHub