Hi! Testing out your app from its flatpak package, I noticed that when you activate/click the "(i)" button next to a voice's Download button, you get an information dialog that cannot be dismissed quickly with the standard Esc keyboard shortcut.

While it is possible to activate the Close button at the bottom, it isn't as quick and standardized as Escape, and also the widget toolkit in use by this app doesn't make it easy to see where the keyboard focus is on widgets...