New incognito window doesn't close immediately with Ctrl+W
I'm using epiphany 3.31.3-50-g729da979 with WebKitGtk+ 2.23.1 from gnome-nightly's flatpak. However, I'm not sure in which moment this was changed.
Before, I could open a new incognito window with Ctrl+Shift+N and close it immediately with Ctrl+W.
Now, if I do Ctrl+Ẁ, a "tab" is closed (there is, however, not any more than 1 tab opened) and the mosaic tab is shown. I have to press a second time Ctrl+W to close the incognito window.