Hi, thank you for your report!
I actually had they keyboard problem happen to me a couple of times while testing on Ubuntu, but closed the ticket we had on it as I couldn't find a way of reproducing it and as it stopped happening after a while. As none of the other testers who tested on Linux reported encountering it I assumed it was local to my machine. I have reopened the ticket now with the information you provided.
About the game minimizing itself I can't remember encountering this myself. I'll make a new ticket for this and link it to the keyboard ticket and your post.
I actually had they keyboard problem happen to me a couple of times while testing on Ubuntu, but closed the ticket we had on it as I couldn't find a way of reproducing it and as it stopped happening after a while. As none of the other testers who tested on Linux reported encountering it I assumed it was local to my machine. I have reopened the ticket now with the information you provided.
About the game minimizing itself I can't remember encountering this myself. I'll make a new ticket for this and link it to the keyboard ticket and your post.