Our clan on the server 1203 EU PVP (have been playing on the server for about 1.5 years) have had identical problems since some new players joined the server. There have never been any problems like this before, whether the server was full or only 20 were on at the same time.
We have already contacted Funcom including the important people via PM. Although we have already provided various screenshots and videos, chat logs, this continues every evening.
Even if you go through the steam profiles of the respective new players, you already come across proven VAC violations.
It is also noticeable that as soon as you attack the base of the new players, who have built up an immense base very quickly, these 20-minute or longer-lasting disruptions are present in a few minutes.
Unfortunately, Funcom has not really responded so far.
Too bad. We are also drawing the consequences, we will leave this server and invest our money in another game.