Best answer by Stanley_4
Always best to start your own topic if posting here so you don't get confused by answers that don't apply to you.
As a general suspicion since it is in relation to an update, IP assignment issues. One time fix is to power down everything, reboot router and controllers then power suff back up. Permanant fix is assign static/reserved IP addresses from your router's DHCP page then do the reboot and power cycle above.
As to the problem if it isn't IP related, it may be WiFi noise, you can look at your network matrix and see if there are any obvious issues that you can work on. Edit this to hold your IP and see what you get: http://player-IP-here:1400/support/review