Lordaeron, server latency issues?

Hello,
Since yesterday, i've been having horrible latency on Lordaeron, it can vary between 500 to 900 or even 1200+, which is very unusual for me since i always have around 20ms. It really started yesterday, and it seems to affect only my WoW Warmane connection, not the other online games that i play.
I've had quite a few disconnections as well.

Also, it happens whether i use my home internet (fiber) or my 4G connection through phone tethering.
I mean, unless i'm wrong, i can only see this happening server side since all my connections are fine.

Anyone else has been having those issues?
Could a dev possibly confirm this? And if it really is coming from the server, then when we can expect a fix?

Thanks!