I've been testing this with and without the chest strap and it's not at all correct. I deliberately slow my breathing to 1-2 breaths per minute and it goes from

I've been testing this with and without the chest strap and it's not at all correct. I deliberately slow my breathing to 1-2 breaths per minute and it goes from saying 13 to 12. The metric is there, I don't trust it at all.