Port Forwarding Masquerading Issue

Hi Users,

I had specific ports open on my firewall for over a year now and its been working great however, I have a Plex Server which is access from multiple devices and i recently wanted to see which ip's were logging into Plex but it only shows me my routers ip even through ip accessing outside of my network.

I figured it was because Masquerading was turned on and set to my routers ip. I turned it off which fixed the issue, i can now see the public ip of the user on Plex. But now i get the problem where on my devices inside my network i cannot access plex through my public ip i have to use the local ip to access it. Anyone know what im doing wrong?

Any advise would be amazing.

Thanks.