http://cyberkeks.net/Factorio/factorio-current_old.log
I can reproduce this:
http://cyberkeks.net/Factorio/factorio-current.log
http://cyberkeks.net/Factorio/factorio-dump-current.dmp
Steps:
Create: New Game
Click on blueprint book in Bar
Press <Tab>
Move Mouse out of menu
http://cyberkeks.net/Factorio/2020-08-03_13-31-07.flv //now with video