It just happened again: in the middle of writing the screen is layered, and a window pops up saying : *Session expired, please log in again*
My goodness, I could only just copy my text on risk of losing it!
It happened once before, last week. Before that it never occurred.
Really shouldn't be. Might lose an entire page of writing.
Relevant maybe: I use Chrome, latest - on Windows 8.
How can I prevent this?
Thanks for any help,