So I was playing COC2 for about 10-20 minutes, alt-tabbing between windows cause I was getting ready to play games with my friends on something else. When I did it quite rapidly because I kept going to the wrong window, and the game was in fullscreen/borderless fullscreen, the window for the game completely disappeared from both the taskbar and alt-tabbing, and I couldn't cascade the window after a search about it, so I was forced to kill the game via Taskmanager. I did somewhat save recently so I haven't lost too much progress, but this still miffed me quite a bit.
TL;DR as of version 0.4.14, do not rapidly alt-tab the game mid-session when not having saved recently otherwise your PC will swallow the window, never to see the light of day again.
TL;DR as of version 0.4.14, do not rapidly alt-tab the game mid-session when not having saved recently otherwise your PC will swallow the window, never to see the light of day again.