Hi all, we are having the same issue, a lot of back and forth, everything as per their recommendation is whitelisted. We’ve made the browser changes for sleeping tabs etc and it didn’t help. They just blame the network same as others have said. It’s not affecting all users, just some of them.
I wonder what’s causing it, those affected, are you using smoothwall for webfiltering? What AV do you use? Just looking for similarities…