My 800 had a bit of a freak out earlier, the autopause (which I had set to pause when no movement detected) kept on turning on and off, even when moving. The cadence was reading fine and seemed accurate.
I turned it on and off a few times and tried other autopause options (i.e., pause when at certain speed) and it didn't help. So I restored it to factory settings and it seemed a bit better, but still being weird.
Any ideas what to do?