Exit action does not end the process
When containerized, using Alpine distro, The Exit action does not terminate the application (container is kept alive, consuming resources).
which qt version?
I can confirm this behavior when an image is copied to the clipboard.
qimgv 1.0.3
Qt 5.15.13
I would assume that the app lingers in the background to allow for other apps to access the content in the clipboard since on Linux the owner of the content in the clipboard is the app that put it there. (Well, something like this.)
Not sure what a proper fix for this would be to avoid any breakages. Maybe an option to disable such behavior with its default value set to "Enable"? Would be useful to people who use clipboard managers or who are keenly aware of this Linux aspect and don't quit apps before the copied content is pasted.