Unfortunately I can't seem to reproduce this, below is the video link.

ChromeOS Samus, version 53.0.2768.0 dev

I opened the play store, downloaded a game, played the game, my computer ran out of power, I plugged it in, opened it and both windows (play store window and game) were open, I closed the game and then tried to search in the play store and it was totally frozen.

https://drive.google.com/a/google.com/file/d/0B5afbmY9o14JY040QndCNF9HeVE/view?usp=sharing