Facebook and Gmail users - Have you been noticing this? Should I be worried?

For the last week or so I’ve been noticing that I get logged out of Facebook and Gmail even though I check “keep me logged in”. Sometimes it’s normal, but I’d say 7 or 8 times out of 10 that I get online I’m logged out. The same thing is happening with Facebook. Is it a new safety thing that I missed? Are they doing work on the sites that would effect the log in process? I’ve changed my passwords twice this week, that hasn’t changed it. Also, would gophers nibbling on the phone line effect this? We think our underground phone line might’ve been gotten by gophers. So yeah…should I be worried?