Are you getting a "Human Verification" string in your browsing tab when this happens? They have their CloudFront service security turned up a bit too high for the support center site, and I've been getting logged off while in middle of browsing many pages with this message, and occasionally being forced to solve a CAPTCHA. Wondering if that messed up your TLS/SSL connection.
Attend my online "Be your Own TAC: Part Deux" CheckMates event
March 27th with sessions for both the EMEA and Americas time zones