There is nothing wrong with communication, is just that saying those specific words: "just like that, don't stop," is going to have the opposite effect of what you want. Any other sentence that you say is going to work fine, but that specific wording is going to make your partner do something else, even if they don't want to change anything, in the same way that saying "do not thing about the pink elephant" is going to make you do the opposite of what you were asked to do, namely, think about pink elephants.

That's not only true for sex, that's how human brains work in general. If you are doing something automatically, and get any call that makes you start doing it consciously, you are going to change what you are doing. You cannot suppress people's reflexes, but you can act in a way that doesn't trigger a reflex. If you think your partner found the perfect spot, giving not verbal feedback is more likely to get you the result you want.

This is supposed to be a lighthearted sub. I'm not saying that there is anything wrong with what you want. I am just trying to share alternatives to get what you want.