Yes, it is a known issue on our year models and perhaps others. I read a thread about this a while ago. I have replaced two lights and have another one flickering. I paid for the first two and then called Winnebago when the third one started acting up. They provided me with the distributor's phone number and they sent me a new one free of charge. The light distributor wants the model and serial number of the bad light.
2016 Winnebago Vista LX 30T
2012 Equinox V6 AWD w/Sterling AT & RViBrake3
Safe T Plus steering, Koni FSD shocks, rear track bar, heavy duty anti-sway bars