Although I still haven't experienced any left Joy-Con issues since my Switch review unit pre-launch, many others have. A lot of folks have narrowed it down to defective units and "incompatible rooms," which is a not-great experience if you happen to have one of those interference death trap spots.
Naturally people have been contacting Nintendo to get their units fixed, and CNET was able to snap a few "before and after" pictures (spot the difference!). The only alteration seems to be a piece of foam in the bottom right of the picture. It's actually a piece of conductive foam that functions as a shield.
It's unknown how Nintendo is handling this issue entirely. They seem to be sweeping it under the rug, as there's been no national announcement yet, just individual cases with customer support alongside of the widespread reporting of it. They likely don't want to put a damper on their success, but with so many people impacted and not knowing what's going on, it would be the right thing to do, long term.
Nintendo has an easy fix for the Switch Joy-Con desync issue [CNET]
via destructoid http://ift.tt/2o4lbS0