Long Press Mute Function Disabled

I searched around for awhile.  I couldn't find any documentation of a feature like this related to Roku players.  (Roku TVs, yes, players, no - although even with the Roku TVs, you don't press the mute button to activate this feature.)

I also found references to vizio TVs - for example, here is a response from a vizio moderator:  "Hi there, This is actually a feature that we have on our TV's! Just press and hold the mute button on the VIZIO TV remote to sleep the screen! Now if the TV accitdently mutes the TV, the volume up and down buttons will not affect the screen sleeping. Any other button press will wake it up though!"

Could a Roku update affect a TV feature?  I would say yes.  For example, what does holding the mute button do? Does it send the same code over and over again?  If so, maybe just changing the delay between codes would cause the TV feature to not trigger and Roku would never know about it (since they probably didn't know about the feature to begin with). Perhaps try the TV remote?  If the TV remote still activates the feature, then I would think it is something like that.