[SalesForce] Batch apex execute method not invoked

I got a batch apex as below

global class Recalculatemembers implements database.batchable<sobject> {

    public final string query;
    
    //Get the query in constructor
    global Recalculatemembers(string q) {
        query = q;
    }

    //Get the records in start method
    global Database.querylocator start(database.batchablecontext bc) {
        return database.getquerylocator(query);
    }

    //get the members size in execute method and update to DB
    global void execute(database.batchablecontext bc, list<team__C> team) {
        for (team__c item : [select id, (select id from Team_Members__r) from team__c where id in :team])
            item.Total_Number_of_Members__c = item.Team_Members__r.size();
        update team;
    }

    //Final finish method
    global void finish(database.batchablecontext bc) {

    }
    
}

I schedule this by below class

global class schedule_recalculatemembersbatch Implements Schedulable {

    public string query;
    global void execute(SchedulableContext sc) {
        query = 'select id,Total_Number_of_Members__c from team__c';
        Recalculatemembers b = new Recalculatemembers(query); 
        database.executebatch(b);
    }
    
}

I trigger this via below execute anonymous code

schedule_recalculatemembersbatch sm = new schedule_recalculatemembersbatch();
sm.execute(null);

Batch processing doesnt give any error.But when i look into my debug log,i can see execute method in batch never gets called.
Query does return expected rows though.
any clue why?