Hi! I have the same issue on my Macbook Pro 2017, 15 inches, it passed seven months after Apple had changed my keyboard, that is, tope case due to the well-known issue. So there was no warranty, I took it to the service to let them see what happened they just said - something is wrong, we can fix it by changing the whole top case again but I need to pay this time, so I refused. Another man said just wait till the issue with the keyboard would appear in 3-4 years again and thus it will be changed for free :D So, just tolerating it to the moment. So it is a hardware issue, as many others lately with the last generation’s macbooks. We need just to accept they are not perfect, man.