But wait, you said that WiFi is working? I cannot enable WiFi because WiFi enable checkbox is not available after some reboots. So I man not sure if this is same bug.

Either way, I've want to share some experiment:

First, I had to run this (to disable kill swich?):

rfkill unblock 0:

rfkill list
0: asus-wlan: Wireless LAN
        Soft blocked: no
        Hard blocked: no

        
*** FIRST REBOOT ***

Now I've rebooted. I can see WiFi switch in network manage KDE Plasma applet (or whatever it is called). It's not on though as I am using ethernet cable.

Attached syslog-0-reboot-with-wifi-enabled with some interesting lines:

Aug  4 12:40:19 vinco NetworkManager[2964]: <info>  [1470303619.9266] rfkill2: found WiFi radio killswitch (at /sys/devices/pci0000:00/0000:00:1c.2/0000:04:00.0/ieee80211/phy0/rfkill2) (driver iwlwifi)
Aug  4 12:40:19 vinco NetworkManager[2964]: <info>  [1470303619.9266] rfkill0: found WiFi radio killswitch (at /sys/devices/platform/asus-nb-wmi/rfkill/rfkill0) (platform driver asus-nb-wmi)

Aug  4 12:40:20 vinco NetworkManager[2964]: <info>  [1470303620.9939] manager: WiFi disabled by radio killswitch; disabled by state file
Aug  4 12:40:20 vinco NetworkManager[2964]: <info>  [1470303620.9939] manager: WWAN enabled by radio killswitch; enabled by state file

Aug  4 12:40:21 vinco NetworkManager[2964]: <info>  [1470303621.4851] urfkill disappeared from the bus

Aug  4 12:40:29 vinco NetworkManager[2964]: <info>  [1470303629.8188] WiFi hardware radio set disabled
Aug  4 12:40:29 vinco NetworkManager[2964]: <info>  [1470303629.8188] WWAN hardware radio set enabled
Aug  4 12:40:29 vinco kernel: [   33.002054] iwlwifi 0000:04:00.0: RF_KILL bit toggled to disable radio.
Aug  4 12:40:29 vinco systemd[1]: Starting Load/Save RF Kill Switch Status...
Aug  4 12:40:29 vinco systemd[1]: Started Load/Save RF Kill Switch Status.

*** SECOND REBOOT ***

Now rebooted again. WiFi still visible in network manager applet.

Attached syslog-1-reboot-with-wifi-enabled-again . I see same interesting lines as before, looks the same as first reboot:

Aug  4 12:52:15 vinco NetworkManager[2976]: <info>  [1470304335.4960] rfkill3: found WiFi radio killswitch (at /sys/devices/pci0000:00/0000:00:1c.2/0000:04:00.0/ieee80211/phy0/rfkill3) (driver iwlwifi)
Aug  4 12:52:15 vinco NetworkManager[2976]: <info>  [1470304335.4961] rfkill1: found WiFi radio killswitch (at /sys/devices/platform/asus-nb-wmi/rfkill/rfkill1) (platform driver asus-nb-wmi)

Aug  4 12:52:16 vinco NetworkManager[2976]: <info>  [1470304336.4929] manager: WiFi disabled by radio killswitch; disabled by state file
Aug  4 12:52:16 vinco NetworkManager[2976]: <info>  [1470304336.4929] manager: WWAN enabled by radio killswitch; enabled by state file

Aug  4 12:52:16 vinco NetworkManager[2976]: <info>  [1470304336.6760] urfkill disappeared from the bus

Aug  4 12:52:25 vinco NetworkManager[2976]: <info>  [1470304345.8185] WiFi hardware radio set disabled
Aug  4 12:52:25 vinco NetworkManager[2976]: <info>  [1470304345.8186] WWAN hardware radio set enabled
Aug  4 12:52:25 vinco kernel: [   34.002468] iwlwifi 0000:04:00.0: RF_KILL bit toggled to disable radio.
Aug  4 12:52:25 vinco systemd[1]: Starting Load/Save RF Kill Switch Status...
Aug  4 12:52:25 vinco systemd[1]: Started Load/Save RF Kill Switch Status.

** THIR REBOOT **

Attaching syslog-2-reboot-with-wifi-disabled. *I cannot enable* WiFi through network manager applet after third reboot. Checkbox is missing. Some lines:

Aug  4 12:57:15 vinco systemd[1]: Starting Load/Save RF Kill Switch Status...
Aug  4 12:57:15 vinco systemd[1]: Starting Load/Save Screen Backlight Brightness of leds:asus::kbd_backlight...
Aug  4 12:57:15 vinco systemd[1]: Started Load/Save RF Kill Switch Status.

These systemd Load/Save RF Kill Swich lines ar now much earlier in log.

Aug  4 12:57:15 vinco kernel: [   16.219830] iwlwifi 0000:04:00.0: RF_KILL bit toggled to disable radio.

This RF_KILL line is now much earlier in log too.

Aug  4 12:57:17 vinco NetworkManager[2953]: <info>  [1470304637.9248] rfkill0: found WiFi radio killswitch (at /sys/devices/platform/asus-nb-wmi/rfkill/rfkill0) (platform driver asus-nb-wmi)

There is only one "found WiFi radion killswich" line as opposed to previous two logs! /sys/devices/pci0000:00/0000:00:1c.2/0000:04:00.0/ieee80211/phy0/rfkill3 is missing.

These last lines looks the same, thought "RF_KILL" and Load/Save RF KILL when up to the beginning of the log:

Aug  4 12:57:18 vinco NetworkManager[2953]: <info>  [1470304638.6898] manager: WiFi disabled by radio killswitch; disabled by state file
Aug  4 12:57:18 vinco NetworkManager[2953]: <info>  [1470304638.6898] manager: WWAN enabled by radio killswitch; enabled by state file

Aug  4 12:57:19 vinco NetworkManager[2953]: <info>  [1470304639.2206] urfkill disappeared from the bus

Aug  4 12:57:27 vinco NetworkManager[2953]: <info>  [1470304647.8223] WiFi hardware radio set disabled
Aug  4 12:57:27 vinco NetworkManager[2953]: <info>  [1470304647.8223] WWAN hardware radio set enabled

$ rfkill list
0: asus-wlan: Wireless LAN
        Soft blocked: yes
        Hard blocked: no
1: asus-bluetooth: Bluetooth
        Soft blocked: yes
        Hard blocked: no