Hello again, Pelle, I just tested it under sway and the column selection pop up showed up normally. Perhaps I'm using Sway the wrong way?
I simply installed it with apt install sway; logged in from lightdm, learned how to open a terminal, and launched pragha from it. Then, when I right click on the headers row, the column list pops up and the following message is written to the controlling terminal: Gdk-Message: 19:35:07.947: Window 0x55e815cb2070 is a temporary window without parent, application will not be able to position it on screen. (pragha:210292): Gdk-CRITICAL **: 19:35:07.949: gdk_wayland_window_handle_configure_popup: assertion 'impl->transient_for' failed Do you get any similar messages? Perhaps your messages are different and might help us deciding whether the bug is in pragha or in sway. Cheers, Gabriel