I almost always used to get unable to join the party (3) error most of the times, I recently dig into port forwarding in router to change NAT moderate to open following [this](https://www.techadvisor.com/article/744513/how-to-change-your-nat-type-on-ps5.html) article, although this changed NAT type to open in Cold War but the error still occurs.
But i remembered once joining from my mobile phone hotspot to play the game the error never even occurred single time and yes NAT type for mobile hotspot was by default at open i don’t had to make any changes.
Today again I was almost unable to get into any matches using home internet, but suddenly switched to my mobile hotspot and the error just vanished.
Any expert here, what’s wrong with the home internet? How do I fix it?