Frequent sign in required when saving online

I save online frequently, and with the previous version of the software, it was no problem. I was always signed in. Now, I'm asked to sign in, although I did so a short time before. Is there a place this is set, or some other cause I have control over? It's quite annoying, particularly since the fields in that window are not seen by LastPass, so I have to go dig up the password every time.