I use KDE and usually connect 2 4k display in addition to my laptop screen. Today I noticed that some windows dissappeared after I disconnected the 2 external displays.
I noticed a similar issue with XFCE in the past where the windows were somewhere where I could not see them on the small FHD laptop screen but there they were still shown in the panel and I could move them.
However on KDE today the windwos were not even shown on the panel and had to restart the qube to restart the programs.
Is there a workaround for this isse or should I file a bug report?