Before i commented the code below ,
my typing had been consistently interrupted by a pop-up-window or something like that .
Those windows quickly take focus and quickly disappear to take our attention , however , our key focuses are never returned .
modules/FrontEnd/scim_x11_frontend.cpp , int X11FrontEnd::ims_destroy_ic_handler (XIMS ims, IMDestroyICStruct *call_data)
...
...
...
m_panel_client.send ();
/*if (is_focused_ic (ic))
m_focus_ic = 0;
else*/
m_focus_ic = old_focus;
m_ic_manager.destroy_ic (call_data);
return 1;
scim has moved development to github. Seeing that this ticket is unverified I ask you to kindly open a new ticket at https://github.com/scim-im/scim/issues/ if you are still affected by this bug. Thank you.