I'm working in the small company (up to 20 people) and I have a problem with a co-worker, who keeps humming/adding "mhm" phrases when talking to him.
Normally it is not a problem for me when somebody does that, even after every sentence, but this particular co-worker keeps doing this in such a manner that he says "mhm" a couple of times during the sentence and by that gives me the impression that he is not listening at all.
This behaviour seems to me like that person wants me to say what I have to say but he does not care (tells it to me non-verbally before I even finish my statement). It is usually followed by his instructions on what and how I should do something that was the topic of my statement.
Additionally I must add that it is a German company and the colleague was on the same position level as me but moved on to more managing position (Product Manager).
How should I proceed with this?
Should I say that I find this kind of "humming" rude and would like him not to do that anymore?
EDIT: I need to add that it happens also when he is talking with other co-workers and some of them also find that annoying.
It is worth notice that it does not happen when the conversation topic is not related to work.