Although sales have been good, and the the new Zelda is one of the best launch titles in the history of launch titles, that doesn't mean that the Nintendo Switch launch was without issues. One of those being an indeterminate number of people noting that their left Joy-Con controller would periodically, and frustratingly, de-sync for a bit. Which, when playing Zelda means that Link could just as easily fall of a cliff. After investigating this issue Nintendo has come up with a solution.
One that would mean future consoles and controllers won't be affected. For those that are affected Nintendo are offering a free repair, which CNET has reported
as being as simple as a small piece of foam that protects the Joy-Con from interference. Yeah, that's all it was.
Here's Nintendo's full statement on the issue and resolution.
There is no design issue with the Joy-Con controllers, and no widespread proactive repair or replacement effort is underway. A manufacturing variation has resulted in wireless interference with a small number of the left Joy-Con. Moving forward this will not be an issue, as the manufacturing variation has been addressed and corrected at the factory level.
We have determined a simple fix can be made to any affected Joy-Con to improve connectivity.
There are other reasons consumers may be experiencing wireless interference. We are asking consumers to contact our customer support team so we can help them determine if a repair is necessary. If it is, consumers can send their controller directly to Nintendo for the adjustment, free of charge, with an anticipated quick return of less than a week. Repair timing may vary by region.
Affected players are being directed to Nintendo's support page, here