As several users have reported since the console’s release, the left Joy-Con for the Nintendo Switch has suffered from connection problems where it will temporarily disconnect from the rest of the hardware. Now, a new video from YouTuber Spawn Wave suggests that the issus may stem from a design fault inside the controller itself.

In the video below, Spawn Wave disassembles the Nintendo Switch‘s Joy-Con and notices that the two controllers differ from each other in a small but important way. Where the right hand device has an external antenna that is attached to the controller’s motherboard, the left Joy-Con actually has the aerial embedded in the board itself – something that is sure to have an effect on the connectivity of the assembled product.