I still couldn’t reproduce the issue in my latest Chromium, Opera, Vivaldi, Chrome and Firefox on Mac, where timeline renders but new empty tabs are opening. I also tested a IE and Opera on Windows for the latest two versions, and no empty tabs were open.
Can you share which browser and OS versions you are using? I’d also suggest that you disable all your browser extensions to see if the problem still persists. Since I haven’t seen other reports nor could reproduce this issue, it may very likely be something very specific to your browser/OS environment.