I don't know why the following setup doesn't work and it should.
RouterOS ver: 6.12 & 6.13
OVPN status: Connection is established without any problem.
OVPN server in ethernet mode and bridged with LAN segment.
PC1 can ping PC2.
However PC1 cannot ping RB961G LAN gateway IP(192.168.88.1).
PC1 able to get gateway MAC from ARP request.
Wireshark showed RB961G reply every ping with ARP request but PC1 MAC already in RB961G ARP table.
Thank you for your help.