Cannot change dynamic WAP address

RouterOS Beginner Basics
1

Hello friends,

I have RB3011UiAS + RBwAP2nDr2 and I want to setup static IP for acces point.
Initially WAP obtain IP address 192.168.88.253 from DHCP.

  1. I go to router admin panel menu IP->ARP and change dynamic 192.168.88.253 to static 192.168.88.2.
  2. I connect to WAP by MAC using Winbox, go to Quick set and change address acquisition from Automatic to Static
    IP Address 192.168.88.2
    Netmask 255.255.255.0 (/24)
    Gateway 192.168.88.1
    DNS 192.168.88.1

Click OK, but nothing changes.
Configuration remains unchanged.
Why it is so?

2

Go to WAPs dhcp client and delete it…!
Then set a static address through ip addresses…

3

Seems working, but not 100%.

[admin@MikroTik WAP] 
/ip address>export
add address=192.168.88.1/24 comment=defconf disabled=yes interface=wlan1 network=192.168.88.0
add address=192.168.88.2/24 comment="WAP static IP" interface=wlan1 network=192.168.88.0

[admin@MikroTik router]
/ip arp> export 
add address=192.168.88.2 comment="Mikrotik WAP" interface=bridge mac-address=XX:XX:XX:XX:XX:XX
add address=192.168.88.3 comment="HP LaserJet P2015 Series" interface=bridge mac-address=XX:XX:XX:XX:XX:XX
/ip dns static> export 
add address=192.168.88.1 name=router.lan
add address=192.168.88.2 name=wap.lan
add address=192.168.88.3 name=printer.lan

192.168.88.1 and router.lan both accessible in browser.
192.168.88.2 and wap.lan and 192.168.88.3 and printer.lan are not accessible in browser.
But I don’t see obvious reason for this difference.

Then if I try to PING in router web interface
IP->ARP->192.168.88.2
Ping = 0 of 5 packets received 100 % packet loss
MAC Ping = 10 of 5 packets received -100 % packet loss
Especially MAC ping looks strange.

And I can connect to WAP only using Winbox by MAC address. By IP is not possible.
Very strange behaviour.