I had an inkling the remote power button affected only the tv, thanks for the clarification. The stick is not located behind the set, I use my through the wall hdmi cable previously installed for the tv box. Right now the stick sits on a dresser and it remains hot to the touch. As I previously mentioned That when in use, I periodically get an on screen message it is overheating.
The tv-controlling buttons work via infrared signals directly to the tv. The Roku-controlling buttons for Roku sticks work via wifi direct radio waves since a stick is usually used behind the set where lone of sight infrared can't reach it. Roku sticks do run warm to the touch. Since the stick is usually used suspended in air behind the set, perhaps sitting on a hard surface limits its air cooling.
Roku Streaming Stick +, 3810X, Ser YH0059427035, wifi LivRm - Samsung UN55ES6100
Roku Streaming Stick, 3600X, Ser 5S56D8240827, wifi BedRm - JVC EM37T
Roku 3, 4200X, Ser 4124C7087583, wifi GstRm - Sanyo DP26640