Apple Watch Series 7 overheating while charging at a Belkin charging station

My Watch Series 7 is overheating a lot every time I use it at my Belking charging station (the station is able to charge iPhone, Airpods and Apple Watch simultaneously).

It was already the case with my previous Apple Watch Series 7, which overheated every night and that ended up with a failure in its sensors (heart, O2) and wrist detection. Apple Technical Service replaced the watch with a new one.

The new one is starting to do the same (overheating a lot every time I use it at the Belkin station) and I am afraid that it will fail again, as it happened with the previous one.

Is anyone having the same problem? any suggestion? For the moment, I am leaving my Belking station apart and using again the official Apple Watch charger (to check whether the watch is not overheating while charging with the official apple charger).

Thanks