Game does not respond after Save and Quit in Singleplayer

After clicking the Save and Quit button the Game fails to respond, and I have to End Task from Windows Task Manager. Launcher Game Output tab has the following line:

[22:12:34 ERROR]: Game ended with bad state (exit code 1073807364)

This happens consistently after playing a LAN game where I am the host machine; and occasionally when just playing Singleplayer.