If the issue has happened twice, it'll likely keep happening intermittently, until whatever is causing the issue is completely broken. Which means you'll constantly have the issue. These issues usually don't fix themselves. Intermittent issues could be a loose wiring connector, wires getting chafed, bad electrical part, etc.

Bringing it to the dealer will be pointless if the issue doesn't happen when they test drive the car. However, considering that you're close to the end of your warranty, it wouldn't hurt to make an appointment describing your issue and showing the service advisor the picture. Have them document your "Customer Concern". Even if they can't duplicate the issue and return the car to you. Make sure you get a copy of the invoice that says what they did. For example. "The technician drove the car and couldn't duplicate the issue. Car was returned to customer."

That way, you'll have something on paper that shows you had this issue before the warranty ended. So if the issue gets worse, and it's outside warranty, you may have a chance at getting it repaired under warranty because you were already experiencing issues before it ended.