No it is still occurred in replacement product as well, firm ware or software update won't help for design failure

Such a blunt comment have you gone through entrie post before commenting

Unfortunately, complaints are piling up on the Samsung Community Forum and Reddit about excessive battery drain and overheating issueshttps://www.notebookcheck.net/Samsung-Galaxy-Watch4-and-Galaxy-Watch4-Classic-receive-new-features-in-latest-update-...

First thing Samsung galaxy watch 4 has heating issues when we use it to speak .

It is not strange if you have a galaxy watch I can help you in identifying this design failure