ChainsLight on Nostr: Has your connectivity issue been present since the new wifi addition or did it occur ...

Has your connectivity issue been present since the new wifi addition or did it occur before that? Is your modem and new wifi the same device or two separate units?
Perhaps an IP conflict via two devices sharing the same static IP address in the same network causing routing issues. Verify you only have one dhcp running on one of the two devices if they both share the network. if not set your two networks with different ip ranges or use different subnets on each device.