- The tendancy to DDOS mixers started a few days after Chipmixer was shut down (confirmed by more than 1 guy)
Don't forget that CM was often plagued by DDOS too. It was the reason they gave up on the clearnet version entirely.There is definitely a tendancy recently to attack the bitcoin mixers, and more than usual
Even loyce.club had a DDOS last month. For all I know it's the DDOS protection companies doing it 
Mob style, offering "protection"