Slow firewall gui with 150 whitelisted ips

hi, since freepbx 16 when i make any changes or add an ip in the Firewall Network Tab it takes 1 minutes to save the changes, so i press SAVE and after 1 minute it reloads the page, i did not have this issue in freepbx 15 with same numbers of whitelisted ips. Any idea how we can improve this because i am planning adding more ips. Thanks