Seems this behaviour with migration to accel-ppp which currently don’t support proxy-arp for l2tp connection type. As temporary solution, you can set different assigned ip address pool
set vpn l2tp remote-access client-ip-pool start 192.168.2.225
set vpn l2tp remote-access client-ip-pool stop192.168.2.238
UPD:/ Or you can also enable proxy-arp on interfaces (VyOS (192.168.1.1) -> host in remote LAN )
set interfaces ethernet eth2 ip enable-proxy-arp