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My understanding is your VPN client can obtain LAN IP address from VPN server and can ping VPN server with the LAN IP successfully but cannot ping the server (172.22.200.4) in the same LAN as VPN server successfully. And from the Wireshark result, you found that the ICMP request was sent to the server with IP 172.22.200.4 but cannot get the corresponded response for this device. Please correct me if there is any misunderstanding.
Before we go further, I would like to confirm the following questions with you:
Can the VPN client ping the another device in the same LAN successfully?
Is there any anti-virus software between the VPN client and the server with IP 172.22.200.4? If yes, please try to temporarily the third-party software to see if the issue still existed.
Or please try to disable Windows Firewall on servers and clients simultaneously to see if the issue still existed.
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Just want to confirm the current situations.
Please feel free to let us know if you need further assistance.