You may want to try resetting the SMC: https://support.apple.com/en-us/HT201295 https://support.apple.com/en-us/HT201295 My keys repeatedly failed to register

You may want to try resetting the SMC: https://support.apple.com/en-us/HT201295 https://support.apple.com/en-us/HT201295 My keys repeatedly failed to register touches until I did that, now it works flawlessly.