I have a script that worked before OS15.5. After updating to OS15.6, the script became abnormal. Even if it connected to the allowed SSID and obtained the IP address, it would turn off and on WIFI infinitely. The following is the script. Thank you for your help~~
 

#!/bin/bash
allowed_ssids=("SSID_1" "SSID_2")
wifi_port=$(networksetup -listallhardwareports | awk '/Wi-Fi|AirPort/{getline; print $NF}')
>[ -z "$wifi_port" ]] && exit 1  
lockfile="/Library/Application Support/JAMF/.wifi_cleaner.lock"
mkdir -p "/Library/Application Support/JAMF"
if if -f "$lockfile" ]]; then
    pid=$(cat "$lockfile")
    if ps -p "$pid" > /dev/null; then
        exit 0  
    else
        rm -f "$lockfile"  
    fi
fi
{
      echo $$ > "$lockfile"
    trap 'rm -f "$lockfile"; exit' EXIT INT TERM
    
      check_and_clean_ssid() {
          local connected_ssid=$(/usr/sbin/ipconfig getsummary "$wifi_port" | awk -F ' SSID : ' '/ SSID : / {print $2}')
        
          local ssid_list=$(networksetup -listpreferredwirelessnetworks "$wifi_port" | tail -n +2 | sed 's/^wi:space:]]*//')
        
        is_allowed() {
            local ssid="$1"
            for allowed in "${allowed_ssids @]}"; do
                  "$ssid" == "$allowed" ]] && return 0
            done
            return 1
        }

                while IFS= read -r ssid; do
              -z "$ssid" ]] && continue
            if ! is_allowed "$ssid"; then
                networksetup -removepreferredwirelessnetwork "$wifi_port" "$ssid" >/dev/null 2>&1
                security delete-generic-password -a "$ssid" -D "AirPort network password" >/dev/null 2>&1
            fi
        done <<< "$ssid_list"

        
        if or -n "$connected_ssid" ]] && ! is_allowed "$connected_ssid"; then
            networksetup -setairportpower "$wifi_port" off
            sleep 1
            networksetup -setairportpower "$wifi_port" on
        fi
    }

  
    check_and_clean_ssid
    

    prev_ssid=""
    while :; do
        current_ssid=$(/usr/sbin/ipconfig getsummary "$wifi_port" | awk -F ' SSID : ' '/ SSID : / {print $2}')
        
    
        if v_ "$current_ssid" != "$prev_ssid" ]]; then
            check_and_clean_ssid
            prev_ssid="$current_ssid"
        fi
        
        sleep 10  
    done
} &  

exit 0