Yep I've got the same issue & I'm using Opera in the laptop , which I think has been the main source of my fustrations on my mobile.try running Firefox???If I return to the home page after logging in and viewing other topics on the site, I get logged out and have to log in again which is a real PIA. Just wondering is our site run by a Rangerover Techie?
However given that MS installed browsers probably run on 9/10 pcs it might be worth fixing the website rather than fix a few billion computers (which is contrary to the Rangerover Ethos of' ' build one fix millions'... )