Here I am.
Using ssh on the survived AP I can see the election of the new master, but I'm unable to access to the VC using the web UI at the VC IP address.
In this test I used 3 AP, following you can see the log from the new master and the slave one:
Jan 1 08:19:17 KERNEL(- IP ADDRESS - .221): [ 1170.547199] (08:19:17) !!! Pot-Master ---> Master
Jan 1 08:19:17 cli[2613]: <341135> <WARN> |AP - IP ADDRESS - .224 cli| Master Changed - new 127.0.0.1 old - IP ADDRESS - .225 current swarm state 3.
Jan 1 08:19:18 cli[2613]: <341004> <WARN> |AP - IP ADDRESS - .224 cli| Received NTP alert trigger - status is failure, retry - 216, DTLS state - 0
Jan 1 08:19:18 cli[2613]: <341135> <WARN> |AP - IP ADDRESS - .224 cli| Master Changed - new 127.0.0.1 old - IP ADDRESS - .225 current swarm state 1.
Jan 1 08:19:18 cli[2613]: <341004> <WARN> |AP - IP ADDRESS - .224 cli| Swarm State Change from Found to Image-ok
Jan 1 08:19:23 cli[2613]: <341194> <WARN> |AP - IP ADDRESS - .224 cli| Loading configuration, func swarm_timer_handler, line 11596.
Jan 1 08:19:23 cli[2613]: <341101> <WARN> |AP - IP ADDRESS - .224 cli| Execute command-configure terminal.
Jan 1 08:19:24 cli[2613]: <341004> <WARN> |AP - IP ADDRESS - .224 cli| Do CLI wlan factory
Jan 1 08:19:24 cli[2613]: <341004> <WARN> |AP - IP ADDRESS - .224 cli| Swarm State Change from Image-ok to Complete
Jan 1 08:19:26 cli[2613]: <341097> <WARN> |AP - IP ADDRESS - .224 cli| recv_image_check: mac-xx.xx.xx.xx.xx.xx, version-6.5.4.3-6.5.4.3_61959, ccode_idx-255.
Jan 1 08:19:26 cli[2613]: <341165> <WARN> |AP - IP ADDRESS - .224 cli| send image match to - IP ADDRESS - .222.
Jan 1 08:19:31 cli[2613]: <341254> <WARN> |AP - IP ADDRESS - .224 cli| VC add delta configuration id 2 to msg CLI_CONFIG_INIT.
Jan 1 08:19:31 cli[2613]: <341199> <WARN> |AP - IP ADDRESS - .224 cli| send_config_init: send config to slave - IP ADDRESS - .222, csum 5353, using url 0, auto save disable 0.
Jan 1 08:19:37 cli[2613]: <341004> <WARN> |AP - IP ADDRESS - .224 cli| provision try.
Jan 1 08:48:27 cli[4753]: <341135> <WARN> |AP - IP ADDRESS - .222 cli| Master Changed - new - IP ADDRESS - .224 old - IP ADDRESS - .225 current swarm state 3.
Jan 1 08:48:28 cli[4753]: <341135> <WARN> |AP - IP ADDRESS - .222 cli| Master Changed - new - IP ADDRESS - .224 old - IP ADDRESS - .225 current swarm state 1.
Jan 1 08:48:29 cli[4753]: <341004> <WARN> |AP - IP ADDRESS - .222 cli| Received NTP alert trigger - status is failure, retry - 541, DTLS state - 0
Jan 1 08:48:30 cli[4753]: <341135> <WARN> |AP - IP ADDRESS - .222 cli| Master Changed - new - IP ADDRESS - .224 old - IP ADDRESS - .225 current swarm state 1.
Jan 1 08:48:30 cli[4753]: <341004> <WARN> |AP - IP ADDRESS - .222 cli| Swarm State Change from Found to Image_ok
Jan 1 08:48:34 cli[4753]: <341004> <WARN> |AP - IP ADDRESS - .222 cli| Received NTP alert trigger - status is failure, retry - 542, DTLS state - 0
Jan 1 08:48:35 cli[4753]: <341004> <WARN> |AP - IP ADDRESS - .222 cli| restart dhcp helper and dnsmasq!!!
Jan 1 08:48:35 cli[4753]: <341004> <WARN> |AP - IP ADDRESS - .222 cli| recv_config_init: config isn't changed; skip config and change to sync complete
Jan 1 08:48:39 cli[4753]: <341004> <WARN> |AP - IP ADDRESS - .222 cli| Received NTP alert trigger - status is failure, retry - 543, DTLS state - 0