automatically not Switching

i am using indoor and outdoor Wifi access point and controlling from cloud controller, but currently SSID not automatically switching, always we need to disconnect and connect to get the full signal

Do you encounter this problem when you are in an outdoor area or indoors?
You can try adjusting the roaming sensitivity of your AP. Judging from the messages you described, it seems that your terminal did not initiate roaming behavior when the wireless signal of the terminal was poor