Why is my touch bar so buggy? My touch bar often shows the wrong keys, is unresponsive, or (as is the current situation) only shows one or some of the keys. Right now I'm listening to Spotify and only the pause button is showing whereas it usually has my normal configuration. I have hard-set it to a custom configuration which is almost identical to the keys before the touch bar came out.

Note - I just started pressing all over the touch bar and the correct buttons came on in each area that I pressed.

This thing offers little value and causes lots of problems. I haven't played around with it much or done anything with my computer (i.e. fun/sketchy software) that is atypical. Are there common reasons for the new touch bar to break all the time?
I'd imagine the Touch Bar can become buggy for the same reasons that any computer becomes buggy, so what you could do is use Touch Bar Simulator to see what your Touch Bar thinks it's displaying, thereby narrowing it down to if the issue is software or hardware. If it's software, try the usual stuff like disk repair and reinstalling macOS. If it's hardware, it may be time to visit an Apple Store...