I have this tendency to vocalize my prediction of the speaker's next words; this is sometimes interpreted as an interruption. When I do this, I'm not intending

I have this tendency to vocalize my prediction of the speaker's next words; this is sometimes interpreted as an interruption. When I do this, I'm not intending to stop the speaker, or even to speak over them; the goal is to demonstrate that my understanding is synchronized with what they're saying. It's a tool to improve communication, not to disrupt it. I sometimes get the impression that 50% of people do this naturally, and 50% hate it and interpret it as interruption.