Hi, I uninstalled and reinstalled my s health app as it kept crashing, this seems to have resolved the HR graph issue (?) Purely by luck I think but watch this space.
I will report again once I have done some exercise
Please do report back. Try cycling if you can, walking exercise mode always records the HR graph ok (all be it inaccurate) but cycling only records it ok for for me once after a factory reset.
As I mentioned, the problem for me has survived a factory reset of both the phone and the watch (multiple attempts)...it still didn't resolve the issue. I will try recording a walk later and report back.
In the meantime, it would be nice if Samsung commented on this problem...