UPDATE: Played on second EU server and with different accounts: same problems.
I'm afraid you're right.
TY Kupjones, I was suspecting either wot server or my Internet Service Provider (he could do it just to reduce cost, due to hungry customers like players are).
I hope it is wot, because as you already saw in this thread, I'm not alone having this problem.
I'll try server 2, and report back.