I had resolved the issue long ago by turning off constant heart monitoring, but just the other day I nearly got burned again. I fixed it by going to my Wear App, selected apps and opened reach one to see which we're using memory, and either disabled or uninstalled. This solved my problem, again, after a recent update. Samsung is ignoring the issue and will continue to add new 'featured apps.' so you will need to regularly review app usage whenever your watch starts to feel hot. Hope that helps!
Thanks for your help. ❤️ 🌹 Have a great day.