The "x" button in the Export Subtitles dialog doesn't close the dialog. The in-dialog "Cancel" button works, as does pressing ESC. - Aegisub https://github.com/TypesettingTools/Aegisub/commit/3695026c8077d154da49e07e7f2ee3a0a04c74b2 (latest master) - EndeavourOS (arch), KDE, Wayland