hello! i connected my cell phone to the pptp server with ip 11.11.11.11 and i couldn’t ping my local network 192.168.88.0/24 (ping timeout). I set my local’s interface arp to proxy-arp and ping started working. Now i set arp back to enabled but my phone still pings my network. I tried rebooting all my devices + mikrotik but still. Pinging still works 
Or you register the MAC and IP in the ARP or leave it in enabled.
Sorry I know little of English
I dindn’t touch the arp tables in any of my devices