Firewall Log for pppoe user does not show mac address

Hi,
I have two Mikrotik Routers, one is CCR1036 and the other one is deployed in a PC. Both have same OS version 6.38.5. In CCR I get mac address in firewall log like the following:
2017 Nov 5 22:33:55 firewall,info forward: in: out:WAN_iPT, src-mac d0:17:c2:xx:xx:xx, proto TCP (SYN), 172.25.7.79:50825->111.111.111.111:80, len 52
But in the PC based Mikrotik I can see only logs without MAC address:
2017 Nov 5 22:35:21 firewall,info forward: in: out:vlan-INT, proto TCP (SYN), 10.3.1.167:52968->104.23.240.251:80, len 60

How to fix the issue in PC based Mikrotik?

TIA,
Ashim