Russian "raid" of March 2021
Between middle and end of March 2021, the first signs of a new wave of players, who were mostly Russian speakers, were observed. This wave of new users would die out on the end of April 2021.
The motive
It mainly started from a TikTok post, made by ZackNuiton. There was some slight evidence of him having over 25k-45k followers on that platform. He probably mentioned about the Puucraft server, which led to his fans entering the server. Things got more evident on March 25th, when several users were complaining that they couldn't speak Russian in global chat, because of the rule of speaking only English.
A few days later, ZackNuiton's TikTok post would be deleted, although players still joined the server, because of other people who heard the news about Puucraft and mentioning it.