Roaming Sensitivity Level is the Most users blame their ISP for slow speeds in the next room, but often the culprit is a "sticky client" connection.
Enable it. Start with a conservative value of -75dBm . Monitor your devices. If they don't switch fast enough, move to -70dBm. If they disconnect too often, move to -80dBm. It requires tweaking, but the reward is a Wi-Fi experience that finally feels as seamless as cellular data.
Right after roaming, HDH ≈ 0, forcing RSL low. As time increases, HDH rises, allowing normal sensitivity.