Pretendo keeps dropping connections

Basically for some reason I keep getting disconnected when trying to play a game. My current internet should be at NAT A (110 code), but I, or other players, always get kicked out of MH4U after a couple of seconds joining the game with pic related error.
I tried Mario Kart 7 and got similar error but since all it has is matchmaking, I’m still not sure if this issue is from my 3DS/connection alone.

I tried connecting to my mobile hotspot (NAT B, 120) and got the same result. I want to troubleshoot this but, again, I’m not sure if there are games or tools that let me do that properly.
I just want to fight Gogmazios, man

Intermittent stability issues right now, will be resolved soon but no ETA.

Thanks for the hard work!
Others seem to be able to play just fine, though. I’m wondering if even outside of backend issues, there might be problems with my device too.
Is there a way to check client-side connectivity issues?

They should be resolved now, marking as solution