I have recently upgraded my fibre plan from Astro IPTV Maxis's 30Mbps plan to MaxisONE Home Fibre 300Mbps plan, last month. The download and upload speeds are great but I found out that my ping in Fortnite reached more than double of what it was before (~190ms). The weird thing is when I was on Astro's fibre plan the ping was fine (~60ms) so server distance shouldn't be a problem. The high ping only happens in Fortnite and games such as BlackShot showed good low ping (~7ms).

Out of curiosity and frustration, I tried to use my previous router which is the router that came with Astro's IPTV plan. I connected the router to the Maxis plan modem and connected my PC's LAN cable to the Astro router instead of the default Maxis router. Surprisingly, that fixed the high ping issue and made the ping back to normal.

Unfortunately, after about 3 weeks, the Astro router no longer has access to the Internet and the 'Internet' indicator showed red light. I've tried restarting and everything but it still doesn't work.

Maxis said that it was Fortnite's servers fault and there's nothing they can do. But, it's weird that the Astro router showed significantly lower, better ping than the default Maxis router. Plus, given that both of them are connected to the same modem.

Now, I'm guessing it's more of a software issue and it might have something to do with DNS? I have access to the default Maxis router's gateway but I have no idea what to do.
Perhaps, if I apply the same settings from the Astro router onto the Maxis router that would fix the problem? But, how I can I do this?

Please help me.
Thank you!

[/B]UPDATE[B]: I got the Astro router to work again by using the username and password from the Maxis router. However, right now, the ping on the Astro router is as terrible as the ping on the Maxis router (~190ms). Please help.

Okay, I'm requesting Maxis for a public IP. Anyway, what is double nat-ed?

I see. Okay, changing to a public IP FIXED the problem perfectly. Maxis was incredibly fast. Did a request today at 6:00PM and they changed my IP as public at 9:30PM on the same day! Thank you so much for helping me!

Sorry for the really late reply. All I did was ask my ISP to change my IP address to a public IP address. So you need to identify your ISP and just contact them. It's free for Maxis but I don't think it's free for unifi. If they ask for a reason, just say it's for a CCTV setup or a game server. Hope it works!