optimize for new contact case, dont clear cache if group membership doesnt change
optimize for new contact case, dont clear cache if group membership doesnt change

ewheeler/rapidpro,praekelt/rapidpro,tsotetsi/textily-web,harrissoerja/rapidpro,tsotetsi/textily-web,harrissoerja/rapidpro,tsotetsi/textily-web,ewheeler/rapidpro,pulilab/rapidpro,tsotetsi/textily-web,pulilab/rapidpro,Thapelo-Tsotetsi/rapidpro,Thapelo-Tsotetsi/rapidpro,tsotetsi/textily-web,harrissoerja/rapidpro,ewheeler/rapidpro,ewheeler/rapidpro,reyrodrigues/EU-SMS,pulilab/rapidpro,praekelt/rapidpro,pulilab/rapidpro,praekelt/rapidpro,Thapelo-Tsotetsi/rapidpro,reyrodrigues/EU-SMS,praekelt/rapidpro,pulilab/rapidpro,reyrodrigues/EU-SMS