I recently noticed that my touch bar was missing buttons, mainly volume, mute, and brightness sliders were not correct. I tried the reset, kill the touch bar, change to custom touch bar, etc. No dice. Now I notice that the "button" next to the power button is just black. It is THERE, but the spot is dark. I only have one option available for sliding, just to the left of it. Currently this is volume. Anyone else had this happen? is this due to a recent update bug? It was on the prior version of MacOS and it just updated to the latest one today - still a problem.