Ubuntu server can be accessed only after ping

and tank you in andvantage for any suggestion, I hve ubuntu server (20.04) on lan, but I can access to it (ssh or web-server apache) from other pc (windows 10) only if I do a ping from server to client (ubuntu must ping windows).

I read this post, and I tried suggested solutions:

• tried changing ip
• tiend to clear ARP cache on router
• tried to add static ip with /24 netmask.

My netplan configuration is the following:

# This is the network config written by 'subiquity'
network:
  version: 2
  wifis:
    wlp1s0:
      access-points:
        MYNETWORK-ID:
          password: MY-PASSWORK
      dhcp4: true

I tried also to set a static ip from router, but also in this case I must ping from server to client before having ssh access to it.

Why this? and.. how to fix it?

note: i installed wpasupplicant.

note: i have to netplan files in my distro:

1. 00-installer-config-wifi.yaml
2. 00-installer-config.yaml (for ethernet) I leaved both of them also if I changed only first.

wifi perfectly works every reboot (after ping).

EDIT:

I tried, as suggested by Zarh Kasparian, to add MAC adress to netplan config file:

# This is the network config written by 'subiquity'
network:
  version: 2
  wifis:
    wlp1s0:
      access-points:
        MYNETWORK-ID:
          password: MYPASSWORD
      addresses:
        - 192.168.1.110/24
      macaddress: 80:a5:89:ad:85:0f
      dhcp4: true
      gateway4: 192.168.1.1
      nameservers:
          addresses: [8.8.8.8, 1.1.1.1]

Problem still not fixed.. any help?