Topic: Connection is unstable

Hi guys, I've recently moved my console to a room where there's no strong Wi-Fi signal, so I've bought a range extender and it works perfetcly on all devices, but I'm having troubles playing online (especially on Splatoon) because it disconnects me while playing.
I used to play online without any problem because I set DMZ function on my modem, but it's not available on my range extender (TL-WA850RE) and I don't know how to fix this, could you help me?
Thanks in advance.

I Have The Same Problem, I Can't Play At All, And I Don't Even Have A Range Extender

since you went and created another thread, I'll go ahead and close this older one.