Can't find any news sources on this but I can confirm that the latest Macbook Pro 2018 still suffers with the same issue and the previous versions, my down arrow key now requires a lot more force to produce an action compared with the other keys although I have been very careful.
That feel when you're torn between dealing with your broken MacBook pro and it's issues or spending $4k on a new, worse version. Good thing I don't work on the internet and need a stable machine for my income.