The Nintendo Switch's signal problems with the left Joy-Con controller have been well-documented, but Nintendo now says they've been solved.

In a statement Wednesday, Nintendo confirmed that some Switch controllers were affected by a wireless signal issue where the left Joy-Con controller would drop its signal from the console. Nintendo attributed the issue to a "manufacturing variation" and said it had already been corrected at its factories and it wouldn't be present in future Joy-Con controllers. The company is also offering to fix controllers free of charge if they're affected by the signal issue. 

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Via Kotaku, here's Nintendo's full statement: 

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. For help with any hardware or software questions, please visit http://support.nintendo.com.

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In the run-up to the Switch's launch, Joy-Con signal issues were documented by multiple game journalists and reports from new Switch owners continued after the console's release. While Nintendo wouldn't confirm the controller's issues beyond it being a manufacturing issue, CNET found that Nintendo has installed a block of conductive foam in older Joy-Con controllers to eliminate signal issues.