Ring spotlightcam Video Quality is Poor

Hi, i have multiple spotlight cams, but one of them in particular has very poor video quality. I tried everything, resetting it, changed the router position but nothing worked. The quality is so bad that I can’t recognize a number that is quite near, both during the day or night. I think that i maybe defective since I have another one in front of it works just fine. Can someone help me please ? The RSSI is -18. I even attached some Photos.