I'm getting a Too many Async calls created on Class.userAddWorkround: line 8, column 1. I have a trigger making an async call to inactivate Contact and vice-versa. I created the class to receive a list of ids to process. I thought the list would 'bulky' enough to process all in 1 call. What am I missing?

Trigger flipPartnerAccess

trigger flipPartnerAccess on Contact (after update) {
	
    List<User> potentialUsers = [SELECT Id, ContactId FROM User WHERE Profile.userlicense.name = 'Partner Community Login'];
    Map<Id, User> emailToUserMap = new Map<Id, User>();
    List<Id> usersToDrop = new List<Id>();
    
    for(User u : potentialUsers){
        if(u != null){
        emailToUserMap.put(u.ContactId, u);
        }
        
    }

    for(Contact con : Trigger.new){
        if(con.Status__c =='Inactive'){
            usersToDrop.add(emailToUserMap.get(con.id).id);

    }
         
        }
    if(usersToDrop !=null){
            userAddWorkRound uak = new userAddWorkRound(usersToDrop);
    }

}

userAddWorkRound
Future

public class userAddWorkRound {
//Class is a workaround for the MIXED_DML_OPERATION, DML operation error on setup object is not permitted after you have updated a non-setup object (or vice versa): Contact, original object: User
    
    public userAddWorkRound(List<Id> uid){
        List<Id> UserID = uid;
        system.debug(UserID);
            if(!system.isFuture()){
            AddUserAccessObject(UserID);
            }
        
    }
    
@future
private static void AdduserAccessObject(List<id> uid){
    system.debug('running');
    List<User> u = [SELECT id FROM User WHERE id = :uid ];  
    system.debug(u);
    if(u.size() != null){
        for(User use:u){
            if(use.IsActive =true){
            use.IsActive =false;
            }
        }
         
  update u;

    }

}
}

Thanks for your help.