Yesterday, the local Apple Store emailed that my wife’s former 13.3-inch MacBook Pro with Touch Bar was ready. We picked up the laptop hours later. If you haven’t heard about specks of debris causing MBP keyboard failure, I can confirm from our experience that such problem occurs. In mid-June 2018, Apple initiated a free repair program, which we used last week with surprisingly positive results.
I purchased the custom-configured MBP in mid-November 2016, and right out of the box the spacebar occasionally skipped. The malfunctioning worsened over time, and, coincidentally (or not), reached crisis a few days after Apple admitted to problems with the Butterfly keyboard. The spacebar became stiff to touch, requiring considerable pressure to push, sometimes working but more often not.