@RelaxRN,

This could be a result of things in your environment such as interference, appliances, metal objects or even just thicker walls.

If there is interference, you may be able to get a better connection by simply moving the node to an area that has fewer obstacles between the main and satellite node.

What model and firmware are you using for your network? Recent firmware updates have added functionality to force nodes to connect in a certain order. Meaning that you can force a daisy chain, or force a node to talk with the main - allowing further optimizations to the network setup.

From your deco app, can you see how the nodes are connected? Is the slowest node connected directly to the Main node?