The issue itself relates to one of the Switch’s tiny Joy-Con controllers — usually the left Joy-Con — disconnecting from the console during wireless gameplay.
The foam is generally used to shield electronics from radio-frequency interference, which is what Nintendo suspected of causing the issue in the first place.
According to CNET’s Sean Hollister, however, it looks like the Japanese console maker has finally figured out a permanent fix.
After experiencing desyncing first-hand, Hollister tore down his left Joy-Con before sending it back to Nintendo for repair.