Hello, I have a Deco S7 AC1900 model 3-unit set. It says on the device that its ports are Gigabit ports. I connected the Cat6 cable from my main router to my main Deco and completed the setup. I was able to get Gigabit speeds. Then, I connected another Cat6 cable to the Lan2 port of the main Deco and linked it to my computer. My speed suddenly dropped to 100 Mbps. I removed the Cat6 cable from Lan2 and reverted to the initial setup, but it didn’t fix the issue... It still provides 100 Mbps. How can we resolve this ?