Premiere randomly closes itself. "Do you want to save?" Esc > Message popups straight back up

[lflegg]

It seems completely random to me. I press Esc saying (usually out loud) "No! I don't want you to close!" and the popup disappears then immediately reappears again.

I'm forced to say YES save everything

Then it closes and I immediately relaunch. 

No warning like I'm used to about a crash or bug or any issue / flag in the bottom right corner.