I just got the Roku Streaming Stick+, had a little issue with the remote. I think that is resolved? HOWEVER, while I was trouble shooting that I noticed that the streaming stick was hot and well as the adapter. When I turned off the tv I left it to cool for awhile BUT when I checked it was still hot, not warm, hot. So I disconnected it.
To start: I have it hooked up to the tv’s HDMI and the USB adapter provided. When I noticed it was “HOT” I disconnected the HDMI “only” but kept the USB connected. Now with the TV OFF, the connection of the USB adapter is “WARM” not “HOT”.