I'm using the original adapters. The Deco M9 devices are in open space and have a good airflow around them. However, the spec says the normal operating temperature should not exceed 40 degrees...

I have 3 Deco M9 Plus devices are pretty warm (they are brand new and recently bought from Costco). 2 of them are 47 degrees Celsius and 3rd one is 51 degrees Celsius. The specification says normal...