SM-810 / Tizen version 4.0.0.1

I'm not sure if anyone else has noticed this issue. Above is the model and software of my Galaxy Watch 42mm that I bought on Black Friday this year...

I've noticed that while I'm at home or going out and about during the day, I have absolutely no issues with stress and heart rate monitor. When I go to work, where I know I have issues with spotty cellphone reception and poor WiFi that cuts in and out a lot, my heart rate monitor gets a little funky.

The real kicker is when I drive to and from work. When I go to work in the morning it reads 70-80, which is normal for me, but when I leave work it hikes up to 110, then 130, then 190, and it doesn't drop, it keeps rising. I eventually have to take it off and put it back on again because it just stops reading altogether... I'm really beginning to wonder if it's the WiFi.

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Anyone else noticed something similar?