I wasn't in co-op when I got banned I don't know why or how😔
I contacted customer service about the reason for the ban
They sent a long message 😅
Greetings Traveler! Thank you for contacting us. After repeated checks, we confirmed that the account had use 3rd party apps. This decision is final, Traveler, we will not block/ ban accounts created in accordance with predetermined rules. For the convenience and security of your account in the future, we recommend that you follow the regulations we mentioned earlier. Here is the list of 3rd party plug-ins that could result ban for your account - Macro application - Keyboard mapping application -Control mapping application -Applications that can manipulate game clients -Applications that can manipulate memory -Third-party applications outside miHoYo, related to games -It is not recommended to use game boosters. - Illegal Top-up / Top-up Refund - Account Sharing - Sell/buy accounts We hope this clarifies your inquiry.