I have a 2017 MBBp. I am alternating space and letter press:

bb bb b b b b b b b bb b b b b b b b b b b b b

k k k k k k k k k k k k k k k kk kk kk kk kk k k k

b b b b b b b b bb bb b bb b b bb b b b b b b

k kk k kk kk kk kk kk k k kk kk k k kk kk kk kk k

this has been happening for more than six months. earlier in the laptop's life time, I could get these problems to go away. now I cannot.