Baby doesn't like the taste of milk powder

Hi mommies has anyone here experience baby didn't like the taste of milk powder, like he taste it first then he will refuse to drink after, my 3 month old son always finish his drink halfway sometimes drink 60 ml only when he is so hungry then after he will refuse to drink his milk I am so worried as 1 month he is like this already, what shall I do? Do I need to change his current formula milk? He is on Nan optipro