This is a reported issue since last year, but is now apparently going viral [1]. 五毛 translates as "50 cent party", the somewhat well-known CCP astroturfing division.
According to the comments in the link below, another apparently banned phrase is "gongfei" ( 共匪 ) , which supposedly translates as "communist bandit".
According to the comments in the link below, another apparently banned phrase is "gongfei" ( 共匪 ) , which supposedly translates as "communist bandit".
[1]https://imgur.com/gallery/KQPcEkB