https://www.techradar.com/news/apple-now-accepts-2018-macbooks-into-its-keyboard-repair-program

The saga of Apple's MacBook Butterfly keyboards continues. The Butterfly mechanism used in its recent MacBook lines has been prone to failure, and Apple has apologized for the issue with a repair program on top. Now, coinciding with the release of Apple's first MacBookPro with an 8-core processor, it's expanding its keyboard repair program substantially, reports the Wall Street Journal.

Issues have plagued Apple's Butterfly mechanism since the first iteration with tis 2016 12-inch MacBook. They've been prone to miss key presses, duplicate key presses and accumulate debris underneath the keycaps. The result has been unreliable typing on expensive computers.