Glad to hear it!
If after you move it to the desired location on the other side of the house it then loses connection with the hub, the first step is a “zigbee heal,” as @PhilB suggested. Fortunately, this is really easy to do for zigbee devices.
First pair all the devices close to the hub.
Then after they are successfully paired and show up in your things list, move them to their desired location.
Then take the hub off of power (including removing any batteries) while leaving the bulbs on power. Leave the hub off-line for at least 15 minutes. This will be long enough for each of the bulbs to go into “panic mode” because they can’t find the hub.
Now when you put the hub back on power, each of the individual bulbs Will update its own neighbor table, which is what tells the bulb the best way to send messages back to the hub.
If you don’t do the heal after physically moving the bulbs, then they won’t know who their true neighbors are, and they may get confused about the best route to choose to send their messages.
It can take the individual bulbs a while to do this update, so you might not see the improvements until the next day.