Hue lights on the 2nd Hue Hub would not discover

I have 2 Gen 1 Hue Hubs attached to the same router. Both hubs were seen in the SmartThings app. However, it seems like whichever hub that gets paired last the Hue Lights associated with it would not get discovered. I tried removing Hubs/Lights and repair multiple times, but I couldn’t fix this issue. Can anyone with more than 2 Hue Hubs share their experience? I am on iOS SmartThings app if that makes any difference.